Questions about repairs and parts for other brands of furnaces and air conditioners. Please note that our speciality is Coleman and Nordyne products, so our knowledge of other brands may be limited.
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I have a 1995 Inter Therm mobile home gas furnace that cycles continuously. The burner lights and the fan starts after a minute or so. The fan will run for about 90 seconds and produce heat. After about 90 seconds, the fan will turn off but the burner will remain on as well as the induction fan. This condition will continue for about 30 seconds then the fan will turn back on for 90 seconds and repeat over and over again. I have replaced the T-Stat, fan limit switch, and temperature limit switch but this has not solved the problem. Can you give me any other ideas on what to look for or troubleshoot? Thank you for your help.