Sorry if this has already been asked in the past.
About a year ago I noticed that my vents were blowing room temperature air instead of heat. When I turned the Cool/Off/Heat switch to Off, the blower kept running. When I took the lower door off the heater, the safety switch shut the blower off. I looked around for a while and saw a small dark round object (flat on top) that had 2 wires connecting to the top, and a small thing between the two connectors which turned out to be some sort of reset switch or something... because when I pushed it down, I heard a little "click" and when I went back upstairs and turned the heater back on, everything worked fine ever since.
Now, all of a sudden, it happened again last night because my house temp was about 60 degrees when I got up this morning. I used this switch again, turned the thermostat back to heat and heat started coming out the vents again. But when I got home from work, it was locked up again, blowing cool air. I reset it 2-3 times, I hear the heater igniter kick on and ignite, I feel warm air coming out the vent... then when I go check again 20-30 minutes later, it's locked up again.
Any ideas? It is a HEIL 5000 (NUG5100BFA2), A/C and gas heat.
About a year ago I noticed that my vents were blowing room temperature air instead of heat. When I turned the Cool/Off/Heat switch to Off, the blower kept running. When I took the lower door off the heater, the safety switch shut the blower off. I looked around for a while and saw a small dark round object (flat on top) that had 2 wires connecting to the top, and a small thing between the two connectors which turned out to be some sort of reset switch or something... because when I pushed it down, I heard a little "click" and when I went back upstairs and turned the heater back on, everything worked fine ever since.
Now, all of a sudden, it happened again last night because my house temp was about 60 degrees when I got up this morning. I used this switch again, turned the thermostat back to heat and heat started coming out the vents again. But when I got home from work, it was locked up again, blowing cool air. I reset it 2-3 times, I hear the heater igniter kick on and ignite, I feel warm air coming out the vent... then when I go check again 20-30 minutes later, it's locked up again.
Any ideas? It is a HEIL 5000 (NUG5100BFA2), A/C and gas heat.