Furnace is in a mobile home and has not been run for over a year. it lights off ok , but starts popping after 2 to 3 minutes. the fuel company filled the propane tank and replaced two gas regulators that were external to the furnace. the furnace continues to run and makes the popping sound every couple of minutes. the main burner flame appears to be yellow in color.can anyone give us advice on this problem? thanks jim
It sounds like you have a possible hole in the heat exchanger. Turn the heat off and turn the fan on. If you feel any air coming back out of the heat exchanger, you have a hole. A yellow flame is not a good sign. I would even consider having a service professional come out and take a look.
796 views
Usually answered in minutes!
to dlmcmasters, thank you for the advice, had local licensed hvac repair guy check this furnace out. problem was the high temp limit switch intermittently opening up the circuit then almost instantly closing.this caused the burner to shut down then immediately relight.since this furnace has a two stage gas valve,(low fire on start up then high fire on run mode). with the high limit cycling on off on in less than two seconds the relight was rough, always in high fire, causing the popping noise.replacement high temp fixed the problem. hope this feedback may help others jim40scot
×