Don and Zac came out and assessed the furnace and explained why it was now time to replace it. Don explained in detail what we should look for (the job is bigger than his preferred scope) and the kind of furnace he recommended. When I asked him for his bill, he said, "Call it an estimate. No charge." I thanked them profusely and paid them in cookies. Affordable Furnace is a great business whose expertise and integrity you can trust.
This type of furnace is fueled by liquid propane gas, which is burned to push hot air through your home. A pilot light ignites the burners within a combustion chamber, which push heat into the heat exchanger and eventually through your entire home. Repairing this type of furnace can be more expensive than its electric alternative. For example here are some common propane gas repairs and their costs:

Cleaning the debris that builds up on your filters will aid with the flow of air. When your air filter is clogged, your air handler must work harder to compensate for the blockage of air flow. In addition to driving up your utility bill, the reduced air flow through your heating and cooling system can cause your heat exchanger to overheat and shut off too quickly.    
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