Furnace repair: how does a gas furnace work?

Carrier's Infinity 98 Modulating Gas Furnace with Greenspeed™ Intelligence

Before you can go ahead troubleshooting or repairing a gas furnace, it is important to understand exactly how it works.

Basically, a gas furnace takes in the cold air, cleans it through your air filter, then heats the air up with a gas burner before distributing the warm air through your home’s ductwork.

The heated air eventually cools down in your home’s various rooms and then makes a trip back to the furnace through return air grills and ductwork, where the process starts all over again.

If you are experiencing problems with your gas furnace, it is usually best to call your local Twin Cities heating and cooling professional to address the problem. However, there  are some quick do-it-yourself tips you can do to troubleshoot your furnace problem.

What to do if your gas furnace produces no heat:

  • Check that thermostat is in heat mode and has appropriate temperature setting
  • Move the dial setting up or down a few degrees
  • Check that the circuit breaker or fuse controlling the furnace is not tripped or blown
  • Check to make sure pilot light is not out

What to do if your gas furnace is noisy:

  • A higher pitched “squealing” sound may be caused by slipping blower belt or motor or shaft bearings in need of oiling
  • A lower pitched “rumble” sound may be caused by a poorly adjusted pilot light if this problem occurs with the burners off.
  • A lower pitched “rumble” sound may be caused by dirty gas burners if the problem occurs with the burners on.

Your local Twin Cities Carrier dealer is always ready to answer any of your furnace questions or help you with your home heating needs. You can check out all of Carrier’s gas furnace options here.

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8 Responses to Furnace repair: how does a gas furnace work?

  1. A good article about the possible gas furnace repairs.

  2. Jack Fuller says:

    An excellent article about how a gas furnace works along with some of the problems one will face.

  3. You are right one needs to know how a gas furnace works before attempting to fix it.

  4. Justin Jones says:

    Wow a article that calls a spade a spade. I agree with you only those who know how a furnace works should be allowed to repair them.

  5. An excellent article that clearly states that furnace repair is not a common DIY task.

  6. Rick James says:

    Well, like I always said it is better to have a furnace repair expert do the job. I mean there are somethings in which you should not take risks.

  7. Ryan Pippin says:

    Even though many articles suggest ways of fixing your gas furnace, I agree with this one. You should attempt to fix a furnace only if you have working knowledge about it.

  8. Pingback: Top heating and cooling blogs posts of 2011 | Stay Comfy, Minnesota!

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