I have a Coleman Evcon EB15A in my 1993 double wide mobile home. Last winter I replaced the heating elements that came complete with limit switches. I did this because it didn't' seem to be blowing hot air, just luke warm. I replaced the sequencer at that time just for good measure. It blows warm air now. This winter I'm having trouble with the furnace not turning off and heating up the house way above the thermostat setting. I replaced the sequencer again but it continues to do this. I replaced the thermostat. No help. I called the local HVAC guy who said it was the sequencer and replaced it again. In the last three months he has put four sequencers in it and it will work fine for days or weeks but eventually does the same thing and I have to turn off the furnace at the breaker box. He thought the blend-air device was drawing away low voltage from the thermostat so he disconnected it and bypassed it. No help. I can unhook the two wires to the thermostat as they enter the furnace but the furnace still will not shut off. Tapping on the sequencer to "un-stick it" like the tech asked me to do does nothing. He is out of ideas and I've put enough money in this thing to buy a new furnace. Does anyone have any ideas?
Thanks,
Chipappa
Thanks,
Chipappa