Sound Heating and Air Conditioning Inc. Blog: Posts Tagged ‘Heating Repair’

Heating Guide: Furnace Control Boards

Monday, September 24th, 2012

One way to be a truly responsible homeowner is to familiarize yourself with the major systems and appliances in your home. By having at least some understanding of how, say, your refrigerator or toilet work, you gain understanding of how to use them efficiently and detect when something goes wrong.

The same is true of your Tacoma home’s furnace, which can appear to be a complicated piece of machinery. In order to help you get acquainted with your furnace, we will discuss one of its main control components, the furnace control board.

As the name suggests, furnace control boards are responsible for governing the operation of the furnace. At a minimum, a simple furnace control will control the furnace ignitor (e.g., a spark generator or glow coil), the gas valve and the furnace thermocouple, also called a flame sensor.

More complex furnace control boards will also have control over the blowers and/or the built-in diagnostic system.

To simplify things, you can think of the furnace control board as being a driver and the furnace as its car. Just as the driver oversees all the functions and operation of the car from ignition to shutting off the engine, likewise does the control board for the furnace.

A typical operation sequence for a furnace control board goes something like this:

  1. The control board receives a signal from the thermostat that the temperature is too low.
  2. It starts the ignition system, whether that be a spark generator, glow coil or pilot light.
  3. Once the ignitor is hot, the furnace control board initiates the flow of gas through the burners, where it is ignited.
  4. The control board keeps the furnace running until it is signaled by the thermostat that the temperature is now high enough, or until it detects something is wrong.

(An example of a malfunction where the control board would get involved is a thermocouple that is not detecting enough heat. In this case, the control board would shut off the gas flow to prevent a leak into the home.)

Furnace control boards are an essential part of your Tacoma home’s heating system. For any heating repairs in the Tacoma area, give Sound Heating a call!

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Heating Question: Is Your Furnace Not Blowing Enough Air?

Monday, September 17th, 2012

Have you ever been in your house in the winter, listening to your Puyallup furnace churn away trying to heat the house, but noticed that the whole place is still cold? If you checked the heating vents in this situation, you would probably find that there is not much air flow coming out of them, which is why you are still freezing.

It is entirely possible for the furnace to be burning away, producing hot air, without enough of that warm air ever actually being distributed through your home. So it continues to run and run, resulting in excess wear and tear on the heating system that will probably shorten its productive life, as well as keeping your whole home too chilly.

Why does that happen? There are a several common culprits for insufficient air flow from a furnace. Below is a list of the most frequent offenders, along with solutions for each:

  • Cause: Dirty or broken air filter. An air filter that has accumulated too much build up or is damaged will slow down air flow in a hurry.
    Solution: Clean or replace the air filter as necessary. This should be part of routine furnace maintenance in order to ensure efficient operation. Refer to the manufacturer’s recommendations to see how often you should check your air filter(s).
  • Cause: Damaged, corroded, broken or collapsed ductwork. Your ducts are like the road that warm air travels on. If the road is out, then no one can get through. Simple as that.
    Solution: Have a professional inspect and repair your ductwork. A routine ductwork check is also part of a professional’s annual maintenance inspection.
  • Cause: Blower fan not blowing enough. This can be caused by a loose fan belt, or a dirty motor.
    Solution: First, clean the blower fan and the area around it. It has to deal with a lot of air, so it naturally becomes dirty over time. If that doesn’t fix it, the fan belt probably needs to be replaced.

There are some other causes of improper furnace air flow, but those are the most common and easiest to detect and repair. If your heat registers are not returning any warm air at all, that is likely a different problem and you should call a Puyallup furnace technician at Sound Heating to look at the system right away.

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Heating Question: Why Is My Air Handler Squealing?

Monday, September 10th, 2012

Unusual noises coming from your expensive Seattle heating system never a good thing; they make you worry that something is wrong.

It’s true that an unusual noise does often mean that something needs to be fixed; however, a noise emanating from your HVAC system does not necessarily mean a major repair. You should always have a technician check out if you suspect a problem with your system, but not all problems are going to be expensive to fix.

One common noise that homeowners notice and complain about is a squealing noise originating in the air handler. Usually, this noise is coming from the fan belt that connects the blower fan and the motor. Over time, the belt can stretch out and become worn or misaligned, which makes it slip and generate that aggravating squealing noise.

So, while the squealing can be annoying and unpleasant, a slipping belt is by no means major. A belt is an inexpensive part and a Seattle heating technician can install it in just a matter of minutes.

As long as the noise is a squealing and not a grinding, this simple fix wil often take care of the problem. If you hear a grinding noise, however, immediately shut the unit down and call a technician. This may mean that your motor bearings are worn out and need to be replaced ASAP before further damage is inflicted on the motor itself.

For heating repairs you need in the Seattle area, give Sound Heating a call today!

 

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Heating Repair Service – Another Happy Customer!

Monday, December 19th, 2011

As weather gets colder and colder, you want to make sure that your heating system is working properly and at peak efficiency. The best way to ensure that your equipment is working as it supposed to is by having an annual maintenance visit from a qualified HVAC technician. They will make sure that your system is working as efficiently as possible and take care of any potential problems.

With all repairs, it is always better to catch any problems early. If you wait until your equipment is completely inoperable, it will be much more difficult (and expensive) to have it fixed. If you need any repairs this winter, give Sound Heating a call! We are dedicated to superior customer satisfaction, and we will give you the highest quality service possible. Here is what P. Mittelstaedt in Tacoma wrote to us about his heating repair:

I would like to commend my repair technician “Mitch” for the great job he did repairing and brining my York unit back into operation. His professional expertise and friendly manner was greatly appreciated. He identified a potential problem with the electrical feed, suggested a solution and helped me make a maintenance plan for the system. Please extend my thanks to Mitch. Sound Heating will be my HVAC recommendation to my friends.

– P. Mittelstaedt

If you have any heating problems, such as uneven heating or higher heating bills, get it fixed as soon as possible. Nothing can ruin your holiday more than a broken heating system! And make sure that your equipment is inspected each year.

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Why is My Furnace Turning On and Off? A Question from Seatac

Wednesday, November 23rd, 2011

One of the most annoying things your furnace can do is to constantly keep turning on and off. This on-off cycling keeps your Seatac home from heating up properly. This action – called short cycling – also requires more electricity and drives up utility bills.

Short cycling is caused by an overheated furnace, which triggers safety mechanisms and shuts down the furnace. After a brief interval and cooling down, the furnace starts up again the cycle keeps repeating itself. Not only is it an annoyance, it can also signal more serious problems. A leaking heat exchanger can cause a furnace to overheat – and produce deadly carbon monoxide gas.

If a furnace is working too hard and overheating, it is usually because of airflow in and out. Your home’s ventilation system needs to be clear of dirt, dust, and debris. The more blockage in your ductwork and vents, the more friction is created, slowing down airflow and ultimately ending with an overworked furnace that continues to cycle on and off. And a blocked exhaust vent, such as a chimney or dedicated exhaust vent, can also cause a furnace to work harder. Check for things like leaves or bird’s nests.

The blockage may also be coming from a clogged furnace filter. You should clean or replace your furnace filter after a visual inspection reveals any type of build-up of dust or dirt. Do this at least every three-six months.

If you have a two-speed fan on your furnace, it is recommended that you run the fan in low speed during the cold months and high speed in the warm months. The reason? Warm air is lighter and takes less force to move.

There are other measures to take to prevent short cycling but these usually require a  heating and cooling service technician to correct the problem. If in doubt, call your local qualified heating and cooling contractor and schedule a furnace inspection. Don’t make your furnace work any harder than it was designed for – and keep your home’s occupants comfortable and safe.

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What to Do if Your Heating System Breaks in Tacoma

Friday, October 14th, 2011

What if the heart of your Tacoma home’s heating system – the furnace – stops working? The warm air that used to flow from your vents has been replaced by a chilly draft. It isn’t time to panic, but it is time to take action. Before you do anything, determine why the furnace stopped working. It may be something as simple as a tripped circuit breaker in your electrical panel. Check the circuit breakers first.

The pilot light in your furnace may have blown out. It can be re-lit if you follow the directions in your furnace owner’s manual. You can find answers on how to re-light a pilot light on the Internet, too.

If the shutdown has not been caused by an electrical or pilot light failure, there is still no need to panic. But another obvious question is: did you pay your last gas bill? Maybe you had a shutoff notice and either ignored it or forgot about it.

Now that you are convinced that the furnace has pooped out, here are some things you should do. First, find the name of a qualified heating and cooling professional. If you already use a heating contractor, contact them and schedule a service call.

While you are waiting for help to arrive, ensure that everyone is safe and accounted for. Make sure pets are nearby and protected from the cold, too. What you don’t want to do is use any appliance to keep you warm that is not designed to keep you warm, like a stove. If you have electric space heaters or propane heaters, carefully locate them in a well vented room (windows open a bit or portable fans circulating air). You don’t want any build-up of gases from fossil burning appliances, gases which could contain deadly carbon monoxide.

Huddle up everyone into a room and break out lots of blankets. You may even want to make an “adventure” of this – find a movie to watch and pop up a bunch of popcorn.  If your waiting time is more than 24 hours, you might want to call up a friend or relative and make arrangements to spend the night with them.

The main thing to remember is not to panic. Most qualified heating contractors, knowing the circumstances, will send out a repair person in a matter of minutes or within one or two hours. Just remember to avoid keeping warm by using unvented heating devices.

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How Do I Check a Gas Furnace Draft Pressure Switch? A Question From Kent

Wednesday, September 28th, 2011

Since Fall has started, it important to be prepared for the upcoming winter in Kent. It is a good idea to get yourself ready by learning some basic information about your home’s heating system. For instance, there are many reasons why a gas furnace stops working and in many cases, a homeowner can perform some simple diagnostics to pinpoint the problem. Finding the problem is one thing – fixing it is another. When in doubt, don’t try it yourself. Call a qualified professional.

But let’s look at one possible problem and solution you may be able to perform yourself – testing the draft pressure switch. The draft pressure switch on a gas furnace allows an electrical current to pass through to ignite the furnace. The pressure switch monitors the draft conditions and won’t allow the furnace’s gas valve to open unless draft is correct.

If the switch is malfunctioning, so too will (or will not) the furnace.

The best way to locate the switch is by consulting with your owner’s manual or by going online and simply typing in the words “gas furnace draft switch.” It is identifiable by its round size and is bolted to the outside of the furnace. It should be nearby the draft inducer motor because the two are connected by a metal tube. The tube may sometimes be the culprit, too. A tube that is blocked with condensation may cause the switch to go bad.

To check for proper function, first turn off power to the furnace, either by shutting down the “on’ switch at the furnace or shutting off the circuit breaker.

Use a volt ohm meter to check if the switch is opening and closing properly. Start by zeroing out the meter’s probes by touching the tips together. Using the dial (could be analog or digital), set the meter to 24 volts. Ground the black probe by attaching it to any metal part of the furnace. Then place the end of the red probe on the metal tube connecting the draft pressure switch to the draft inducer motor.

If the switch is working properly the meter should read at least 24 volts, or very near that. If the reading is short of 24 volts, the switch is not working correctly. At that point you may decide to replace it or call a professional to do the task (recommended).

Always remember that there are many sources which will help you diagnose and repair a problem, especially those available through the Internet. If you search YouTube.com you will find many videos advising you on how to repair certain components. Use all of the resources available to you and keep the phone number of a qualified and professional heating and cooling contractor nearby.

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