If the switch is on, but your furnace is still not working, check to see if you have a tripped breaker. Your breaker box is (hopefully) labeled “Furnace” or “HVAC” next to the correct breaker. If not, look for a tripped breaker and reset it, if you can. If your furnace now has power, congratulations.Often you can tell something is wrong with your furnace simply by looking at it. On the outside, a furnace covered with excessive dirt and dust isn't healthy, and it may soon exhibit larger problems, if it hasn't already. Burn marks, moisture and rust is a symptom of a furnace that isn't working properly.
How do I know if my gas furnace is bad?
On gas heating systems the burner flame should be a bright blue color. A furnace warning sign is a flickering or yellowish looking flame. This is an indication that the gas is not burning completely. It is also an indicator that your heating system may be producing a higher than normal level of carbon monoxide.
What does a furnace warning sign look like?
A furnace warning sign is a flickering or yellowish looking flame. This is an indication that the gas is not burning completely. It is also an indicator that your heating system may be producing a higher than normal level of carbon monoxide. Other carbon monoxide warning signs are:
Why is my furnace not heating up?
It’s possible the thermostat is going bad, or that the furnace can no longer keep up with the demands of heating your home. Family Handyman has lots of tips on how to deal with problem thermostats, including this one: How to Adjust a Mechanical Thermostat. Every furnace will need to be serviced and maintained over the course of its life.
Is your furnace making noise during Operation?
We swear, this is also not a sign that your house is haunted! In general, most furnaces make some noise during operation. But if your furnace cycle is accompanied by an increasing amount of shake, rattle, and roll, it could be a sign that some of the mechanical elements are coming lose. In that case, a tune-up is advisable.
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