When it is freezing cold outside there is no better feeling than opening the front door and walking into your home to feel that warmth. The winters in our area can last up to four to five months. A well maintained forced hot air heating system will always run more efficiently. Even though you have had all the tune ups done on your heating system they can still break down at the worst times.
Some of the most common heating repair issues we run into include:
The gas furnace pilot light won’t stay on –
If your gas forced hot air heating system pilot light won’t stay lit, it is because the safety cutoff valve is preventing it. This device is very important and necessary feature of all gas furnaces because it prevents lethal gases from getting into your air supply that would flow through the ducts to your living space.
It also might be an issue with the thermocouple. The thermocouple acts as a sensor. It senses when the pilot light is burning hot enough to light the gas from the main gas valve. If it senses the heat is hot enough, it will turn that heat into an electric signal and sends it over the gas valve and tells it to open and let the gas out.
The thermocouple which is the copper rod you see the pilot flame hitting. It sometimes needs to be adjusted. Sometimes these thermocouples go bad.
The gas furnace is not blowing any air – If your gas furnace is running, but not blowing any air, this could be a sign of an internal issue. But first, check your thermostat to make sure it is set to the heat position and the fan is set to the auto position. If you have the thermostat set to the off position and the fan set to on the fan will run but no heat would be produced.
Next, Check Your Furnace’s Air Filter
To check your furnace’s air filter as this can cause a furnace to stop blowing air for a couple of reasons. First, your filter could be so saturated with dust and debris that air is not making it into your ducts causing you to think that you have a furnace not blowing air when in fact, it is blowing air but your clogged filter is blocking it.
The furnace won’t run at all –
If your furnace won’t run at all try checking the fuses or circuit breaker in the electrical panel. Make sure all the fuses are good and that there is not a tripped circuit breaker. Make sure the switch that is either next to your furnace or at the top of your stairs is in the on position. If this does not get the furnace to start up then it is probably a more complex internal electrical problem.
The gas furnace is not blowing any heat –
If your furnace blows air, but it’s not warm or hot at all heat and it’s not a thermostat problem, it could be that the pilot light is not lit.
If your gas furnace is only blowing cold air, then the pilot light may be out. Check to see if it is and try these solutions:
- Relight the furnace’s pilot light. If the flame stays lit, then you’re in business.
- If the pilot refuses to light, ensure that gas is flowing into the furnace. Make sure the furnace’s gas valve switch is switched to the “on” position. If the switch is in the on position, then check to see if the pilot light tip is dirty. If it is dirty, clean it to allow the gas to come through.
- If the pilot lights, but won’t stay lit, then the problem is with the thermocouple which is the copper rod you see the pilot flame hitting. It needs to be adjusted or replaced.
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