Why is my furnace leaking water?

Your furnace heats your house using either gas or electricity. It doesn’t use water at all. So, if your furnace starts leaking water, the natural questions are, “Where is the water coming from?” and “Why is my furnace leaking water?”.

There are a few reasons why your furnace could be leaking water.

Leaky condensation

Condensation is a problem generally with energy-efficient furnaces. Older furnaces do not produce condensation. Thus the older furnaces don’t have the leaky water problem.

Energy-efficient furnaces have 2 heat exchangers. These heat exchangers keep the warm gases inside the furnace for a while. This in turn makes the furnace gases cool and condense. There are flue pipes in the furnace whose job is to route this water away from the furnace.

When a furnace’s flue pipe is a wrong size, is improperly installed, or is clogged, water can pool around the furnace. If there is a break in the furnace flue pipe, the water escapes.

Clogged drain

Your furnace shares the internal drain system with the air conditioner. If there is a clog somewhere in the furnace flue pipe, the water could be getting redirected into the furnace. This could make the furnace leak water.

Leaky humidifier or air conditioner

The job of the humidifier is to keep the humidity inside the house at a comfortable level. If the humidifier has a leak or is clogged, the water could drain into the furnace and spring a leak. This could lead you to believe that the furnace is leaking when in fact, it is the humidifier.

The only way to fix this problem is to call a reliable Bay Area HVAC contractor. If you’re located in Redwood City or nearby, call Sal at RC Mechanical at (650) 575-3915.

A malfunctioning furnace heat exchanger is another reason that your furnace could be leaking water. This is a complicated heating system issue and you should call your local Redwood City HVAC technician to deal with the problem.

RC Mechanical, Redwood City’s best HVAC contractor, is a trusted local company that will quickly diagnose and resolve your furnace and air conditioning issues. RC Mechanical is a local owner-operated Redwood City business and has provided expert furnace and air conditioning repair and installation to the Bay Area with integrity for over 20 years. Homeowners in Redwood City and throughout the Bay Area count on us for all their heating and air conditioning needs. Call us today at (650) 575-3915.

5 furnace checks to do before the winter

When the furnace doesn’t turn on on that first cool fall day, you may worry what it might cost, and how long you will have to live without a furnace.

There are a few things you can do to take care of small HVAC heating system issues. This blog post will show you how to diagnose and fix the most common simple issues with your furnace.

1. Check your thermostat

Some programmable thermostats can be complicated to program. Here are the most common things to check in a thermostat:

- First make sure that your thermostat is turned on for furnace. Thermostat should be set to “Heat”. Without this setting, the furnace won’t start.
- The temperature setting on the furnace’s thermostat should be higher than the temperature inside the house. E.g., if your room temperature is 65 degrees and your thermostat is set to 60 degrees, the furnace won’t kick in. The furnace setting should be at least 5 degrees over the room temperature for the furnace to start
- Check the time on the thermostat. If it isn’t displaying the correct time, fix it.
- Make sure that the furnace’s thermostat wires are not cut, frayed, loose, or otherwise compromised all the way to the furnace.
- Set or turn the furnace fan to “On” or “Auto”.

While you are checking the furnace, don’t forget to replace the battery. Without this, your thermostat settings will be lost if the power goes out even for a second.

2. Switches

Make sure the furnace’s power switch is turned on. Without this, your furnace can’t get the electricity and won’t start.

3. Breakers

First, turn off the furnace switch in the electrical panel. Now check the fuse in the power switch. If the fuse is blown, replace it.

If you don’t know how to replace it, it is time to call your furnace repair technician for inspection and repair.

4. Pilot light/electronic ignition

If you have a gas furnace, then check its pilot light. If it is not on, then depending on how handy you are, you may either call your furnace technician to light it or light it yourself.

If you have an igniter instead of a pilot light, make sure that you hear a clicking sound when the furnace is supposed to turn on. If not, you have a problem with the igniter. Call RC Mechanical, Redwood City’s best HVAC contractor, to quickly diagnose and resolve your furnace, thermostat, and air conditioning issues.

5. Change furnace filters

A clogged furnace filter can turn the furnace off. Dust and dirt don’t allow the air to move freely. This could make the furnace’s heat exchanger overheat and shut off.

Still stumped?

At the end of checking all these checks, if your furnace still doesn’t turn on, then call your local Redwood City HVAC technician for an inspection and possible repair.

Should I get a gas or an electric furnace?

Every day there are more and more furnace options available to consumers in Redwood City and throughout the Bay Area. These delivery varied levels of comfort, price and fuel.

Furnaces run primarily on either gas or electricity. There are pros and cons to both kinds of heating system.

Installation

The first furnace installation question you need to answer is whether you should get a gas or an electric furnace. If your home doesn’t have a gas connection, then you may want to consider an electric furnace. Getting a new gas line into your home can be expensive.

Safety

As part of the heating process, gas furnaces release carbon monoxide and other toxic gases. The State of California requires that homes with gas furnaces have a carbon monoxide detector. The gas furnace installation needs a ventilation system to safely direct these gases outside. Consequently, installation of a gas furnace can be more expensive than an electric furnace.

If you have a gas furnace, make sure that you have an automatic gas shutoff that will turn off the gas during an earthquake. Your HVAC contractor can do this for you.

Cost

The average cost of a gas furnace is around $1200 plus $2400 for installation.

Electric furnaces are slightly cheaper. The average cost of an electric furnace is around $670 plus an average installation charge of $2000. With an electric furnace (heat pump), you also get an AC.

Gas furnaces are generally more efficient and cost significantly less to heat the home than electric furnaces.

In remote areas that are not served by a local gas company (such as PG&E), it is common to use propane to make the home comfortable. It would be best for such homes to convert to a heat pump powered by propane. With the heat pump, you can both cool and heat your home.

So the question for you is: Do you want to spend up-front on your heating system and pay less over the years in ongoing furnace costs, or spend less on your furnace in the beginning and spread it out over the coming years?

Maintenance

Both types of furnaces need to be maintained professionally to make sure that they are safe, efficient and are working as intended. Gas furnaces require regular maintenance to ensure that the ventilation system is working well. Both types of heating system require replacement of their filters at regular intervals.

Lifespan

Gas furnaces last about 20 years on heat exchangers and electric furnaces can last almost 15 years. Electric furnaces have a lower lifespan because they work as both AC and furnace and get used all year round.

We will help you pick your furnace!

If you are in the market for a new furnace, Redwood City’s best HVAC contractor will help you evaluate the best furnace for your needs and home. We perform maintenance, repairs, and installations of new heating and air conditioning systems. Homeowners in Redwood City and throughout the Bay Area count on us for all their heating and air conditioning needs. Call us today at (650) 575-3915.

Smart Thermostats and HVAC

Why you need a smart thermostat

Having a good thermostat is very important to ensure your furnace and air conditioner are operating at maximum efficiency. You save both energy and money if your furnace and air conditioner are intelligently programmed.

For example, with a conventional thermostat you might set your desired temperature to 72 degrees. Then if you leave the house for 8 hours, your furnace is working to keep your house at 72 degrees when you are not even home. This is wasted energy and money. With a smart thermostat, you can turn the temperature down once you arrive at work. This enables your heating system to operate on low or even shut down while you are away. Then, when you are 30 minutes from home, you can use your smartphone to remotely set the temperature back to 72 degrees, turning the furnace on, so that you arrive home to a nice toasty house.

On a hot day, you can do the same thing with your air conditioning. Our HVAC experts can recommend and install a smart thermostat for you.

Be efficient with a smart thermostat

Smart thermostats, like Nest, have many advanced features, including letting you program your desired temperatures based on the day and time, plus controlling the temperature remotely via your smartphone. This works for both your heating and air conditioning systems.

How we can help

We can install a Nest thermostat for you for $575. This includes the Nest thermostat itself, installation, configuration, and a 5-year warranty. Plus, instead of just the 2-year warranty provided by Nest, we give you a 5-year warranty — and we’ll take care of the warranty issues for you, like getting a replacement. Call the HVAC technicians at RC Mechanical today. Homeowners in Redwood City and throughout the Bay Area count on us for all their heating and air conditioning needs.

Before you buy a house, get to know its HVAC

HVAC is not the sexiest part of a house, but it is an important to know if your furnace and AC are working well and installed correctly to keep your home comfortable for you.

If HVAC is not installed properly or not working correctly, it is going to cost you more to operate for the lifetime of the equipment. And when you are fed up with the HVAC system in your house, you will have to pay to replace it out of your pocket.

Here are a few things you should keep in mind about the HVAC before you buy a house:

1. Check to see if the HVAC is working.

Turn on the furnace and/or air conditioning and check to see if the hot/cold air is coming out. Soon you should feel a difference in the temperature in the house.

Walk into every room of the house. Each room should have the same level of comfort. There should be no temperature or comfort difference between the various areas of the home covered by the HVAC.

If this is not the case, then hire a qualified HVAC contractor to check the real issue with the HVAC system.

2. Visually inspect the HVAC unit(s).

Check the HVAC unit to see if it is clean. If there are black stains on the fiberglass, then that could be a sign of a problem (air leakage). Time to hire a heating and/or cooling contractor.

3. Utility bills

Ask the current homeowner for the utility bills. If they seem high for the house and the HVAC seems to be working, then it could be a sign that there might be a leak somewhere.

4. Check the thermostat.

Make sure that there is a programmable thermostat and know how to operate it. You should also have the manual for it. Or at least be able to find its manual online.

5. Get paperwork for a new home.

If the home is a new home, then remember to get all the paperwork that goes with the house, including installation manuals, warranties, etc. Contractor should also give you a year of warranty on labor for the unit. The parts warranties are generally from 5-10 years from the factory.

6. Hire an HVAC contractor.

If you suspect there might be a problem, hire a qualified HVAC contractor to do the checks. Since you are paying him, he will be working for your best interests.

If there is a problem, he can tell you how it should be fixed properly instead of the hired contractor from the buyer putting a band-aid on the problem. Such band-aids will not hold up beyond a few months. Then you will be left to fix all the issues.

7. Insurance

Be aware that HVAC insurance generally covers breakages and not regular maintenance.

RC Mechanical is an owner-operated Redwood City business and has served the Bay Area with integrity for over 20 years. If you have any questions about the HVAC of the house that you plan on buying, give us a call at (650) 575-3915. Homeowners in Redwood City and throughout the Bay Area count on us for all their heating and air conditioning needs.

Questions to ask your HVAC contractor

Before you hire a heating or air conditioning contractor, you need to know how they are going to do the work. Even if you don’t know anything about HVAC, you should be able to get a good idea of their work ethos with these questions.

1. How are you going to size my HVAC equipment?

Getting the right-sized equipment for your house and your needs is very important for efficiency and energy use. Why get a bigger and more expensive size HVAC equipment, when a smaller and less expensive one will do?

When it comes to an HVAC equipment, bigger is not better. If it is bigger, it will turn on and off frequently. This will significantly lower the life of the equipment.

One of ways to do the sizing of a furnace or air conditioner is by Manual J which is the protocol that is used to determine how much heating/cooling a home needs to stay cool and dry in the summer and warm in the winter.

2. How do you keep up-to-date on the current regulations?

The Department of Energy creates and revises its energy efficiency standards and other regulations. It is important for the HVAC contractor to stay on top of these regulations so your equipment and the installation meet those regulations. In extreme cases, it may be harder to sell your home unless the installations are up to code and it could run you thousands of dollars to bring a bad installation to code.

3. Who is going to do the work?

If the contractor is going to do the work, then he is going to do the best work he can. If he is going to hire other people to do the work, then the quality of the work will depend on the expertise of those workers.

4. If you are going to hire others to do the work, how are they paid? Hourly or by the job?

If the hired workers are paid by the job, they will try to finish the job ASAP to get to the next job. This could result in the job being rushed and the quality of the work could suffer.

5. What kinds of materials will you be using for the duct work? Will you be doing any custom fabrication for the furnace?

Many contractors use wire flex pipe. The advantage is that they are made of plastic and fairly inexpensive. Unfortunately these pipes are generally not installed correctly. Also, rodents could chew on these pipes!

Remember that you have an already existing furnace, then the HVAC contractor should do custom fabrication to ensure proper air flow without any leaks.

6. Are you going to look at the whole house for inefficiencies, determine the size of the equipment needed, installation, etc. or are you just going to sell me the equipment?

Does the contractor want to sell you a metal box aka furnace? If your house wasn’t getting heated or cooled properly because of a leaky duct, replacing the equipment isn’t going to solve the problem. So it is important for the contractor to evaluate the system you have in place instead of simply installing new equipment.

7. How are you going to determine that the system is running to its full capacity?

Your HVAC contractor should have a process in place where they show you how well the system is working.

8. Are you going to get the permit?

Any time you replace your furnace, the state requires you to get a permit. And it is the contractor’s responsibility to get the permit. The contractor is responsible to know the rules. A permit ensures the minimum requirement for the work is met.

9. Will you teach me how to do basic maintenance on the equipment?

Whether it is changing the filters or looking for issues, the contractor should give you instructions on how best to take care of your heating or air conditioning installation.

10. Are you and/or your company licensed and insured to work in my state/city?

Yes, there are companies and individuals out there who are not licensed to do any heater or air conditioner installations, but routinely do it. This puts you, your home and your family at risk for possible gas leaks, fires or pushing contaminated air into the house. Always ask to see your HVAC contractor’s license and liability and check their validity on your state government website.

RC Mechanical is an owner-operated Redwood City business and has provided expert furnace and air conditioning repair and installation to the Bay Area with integrity for over 20 years. Call us today at (650) 575-3915. Homeowners in Redwood City and throughout the Bay Area count on us for all their heating and air conditioning needs.

Duct work

The basics of an HVAC system

There are 3 main factors that go into determining if your furnace will work at its peak efficiency. They are:

1. The furnace itself
2. The duct work
3. The installation

If any of these has a problem, you will know that your furnace/air conditioner is not working to its full capacity. This blog post will deal with the least sexy part of this sytem: the duct work.

The job of duct work is to distribute hot/cold air all through the house equitably. When the duct work is installed properly, the furnace or AC keeps all rooms in the house at a comfortable temperature.

An improperly installed duct system would render your home uncomfortable even if the furnace or the air conditioner is sized correctly for your home and functioning properly.

This is analogous to buying a Mercedes-Benz S-class with tires and inner tubes from the 1970s. Sure, the automobile is high end, but without good tires, you are not going to get the pleasure or the comfort of driving such a exclusive vehicle.

Improperly designed or installed duct work lowers the efficiency of the equipment. If there is a leak in the duct work, your energy bills will be higher even though you may have bought an energy-efficient furnace/AC. The same is true if the duct work is not insulated.

Is your furnace is working to its full capacity?

When you buy a furnace, the equipment comes with the specifications that tells you the temperature rise of the equipment. To see if your furnace is working to its full capacity, turn up the thermostat to 5 degrees over the ambient temperature. This should turn the furnace on.

After about 15 minutes, check the temperature in the register closest to the furnace. You can use a meat thermometer for this. Then check the temperature in the return air.

The temperature difference between the two should be within the range specified in the factory specifications for temperature rise.

If it is not within this range, check the furnace filter. If it is dirty, replace it. Next, make sure that the supply and return registers are not closed or obstructed in any way.

If both these are ok, then it is time to call your HVAC specialist.

RC Mechanical is an owner-operated Redwood City business and provided expert furnace and air conditioning repair and installation to the Bay Area with integrity for over 20 years. Homeowners in Redwood City and throughout the Bay Area count on us for all their heating and air conditioning needs.Call us today at (650) 575-3915.

Prep your AC for the summer

Check if your AC works before the summer season hits

Since the weather is still fairly cool, you may not think that it is time to worry about AC just yet. This is precisely the time you should!

It is important to make sure that your AC is working well before the summer’s hot days are upon us.

As a homeowner, prepare your AC for the summer months by first testing it yourself. If you are lucky, your equipment may have weathered the winter just fine.

Follow the 4 steps below to check if your AC is ready for the summer.

1. Physical inspection

This involves physically looking at the AC equipment and clearing the dust, leaves and other debris around it. Clear out cobwebs and dirt from around it. You may also use your hose to give the equipment to clean the exterior of the AC. Check for any missing panels.

Change your air conditioner’s filter at the beginning of the season.

2. Turn system on

Before you turn the AC on, visually ensure that the electrical wiring is not damaged.

Turn the AC on. If it starts, hooray! If not, check to see if the equipment is plugged in!! The air conditioner’s plug could have gotten accidentally dislodged from the outlet.

Make sure all the the circuit breakers and fuses are in place and turned on.

Also, set the thermostat to ‘cool’ and make sure that the thermostat is working properly.

3. Check the ducts

Air conditioning ducts carry the cool air from the AC to all the rooms. Ducts are hidden from view. The way to check the ducts is to find out if the air is coming out of all the registers in the house. Initially the air may not be cool and that is ok. At this point, we are just checking to see if the air is coming out of all the registers in the house. If it is, then the ducts are working well.

If the air doesn’t come out the register with the same force as in the other registers, then we may have an issue with the ducts. Call your AC contractor.

4. Check the temperature

The last step is make sure that the AC is actually pushing cool air. You can use a regular meat thermometer for this.

After 30 minutes of running the AC, the temperature of the air being pushed at each of the registers should be 55 degrees. If it is not, then your AC may be low on freon or there may be some other issue with the AC.

Summer days will be here soon enough. Make sure you are ready for them with a well-maintained and efficient air conditioning system.

RC Mechanical is an owner-operated Redwood City business and has served the Bay Area with heating and air conditioning expertise for over 20 years. Call us at (650) 575-3915 if you need any help getting your AC ready for the summer. Homeowners in Redwood City and throughout the Bay Area count on us for all their heating and air conditioning needs.

Filters & Allergies

Would you like to make sure that your home is a safe haven from allergies?

Often people buy filters for their heating and air conditioning installations but then are disappointed when their allergy symptoms don’t improve. In fact, having an air filter is just one of many things that need to be done to make your home safe from allergens.

When you call us to request changing your air filter, we first ask about the sensitivities you have. Are you allergic to mold, dust, pollen? We can’t control the outside, but we can certainly make sure that the air you breathe inside your house is keeping you comfortable.

Then we test the house for a variety of issues. We measure the rate of air changes per hour. The standard is 3-5. If it is 5 or more, then that means that there is air leakage into the home. The air is most likely coming in from either the attic or the crawl space.

Depending on how many symptoms you want to tackle, we can recommend the best air filter for your needs. Filters have merv ratings. The higher the number, the better the filter. Merv ratings go from 1 to 16.

We recommend an IQAir Perfect 16 filter for homeowners who want their air to be as clean as possible. These filters have a merv rating of 16. When we install this filter, we just don’t tell you how this filter is operating; we show you. We take air quality readings before and after we put the filters in.

When you use a cheaper air filter with a merv rating of 2 and under, you are helping protect the furnace but not doing very much to protect your health.

Have any questions about filters? RC Mechanical is an owner-operated Redwood City business and has served the Bay Area with heating and air conditioning expertise for over 20 years. Homeowners in Redwood City and throughout the Bay Area count on us for all their heating and air conditioning needs. Give us a call at (650) 575-3915 and let us help you.

Does your furnace shut off before the thermostat temperature is reached?

The Woodside house was fairly new — only about a year-and-a-half old. The homeowner was noticing that the furnace would shut off automatically before the thermostat temperature was reached. In addition, the homeowner heard gurgling noises from inside the furnace’s pipe.

Luckily, the Woodside homeowner called RC Mechanical. When Sal opened the sheetrock to investigate and cut into the furnace’s PVC flue pipe, water gushed out. This isn’t supposed to happen!

This was the problem: According to installation instructions for the furnace, the pipe should have sloped at the rate of .25” per foot back to the furnace. Instead, this home’s pipe sloped 1” per foot. This created a trap for the water to collect.

This is one of the many problems that can occur as a result of poor furnace installation. When the furnace is not installed correctly, water collects wherever it can. The furnace detects water collecting in the pipes and does a safety shut down, to avoid a dangerous buildup of pressure.

How can you tell if you have this problem with your furnace installation? If your furnace turns off prematurely before the thermostat temperature is reached, then it is time to call an expert HVAC contractor like RC Mechanical.

RC Mechanical is an owner-operated Redwood City business and has served the Bay Area with heating and A/C expertise for over 20 years. Homeowners in Redwood City and throughout the Bay Area count on us for all their furnace and air conditioning needs. Call us today at (650) 575-3915.