3 Answers

....call a professional 

....don't chance a fire

7 years ago. Rating: 2
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Take the bottom front panel off. There is a small red light that should be blinking a code. Look on the inside of the panel that you took off and there should be a guide to explain how to read the code and the problems it's having. If you don't feel comfortable fixing it at least you can call and give the information to a plumbing and heating specialist.

7 years ago. Rating: 2
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Could be an airflow problem. Have you had the furnace serviced recently? If no, check the filter/s. 

10 years ago. Rating: 1
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