white rodgers 50a50 indicator light unlit
My furnace was working fine until an event. The event was that the thermostat got switched from heat to cool on an unusually warm Easter day. Problem was that I had a trap over the air conditioner to keep critters and debri out. I estimate the a/c was on for 10 minutes. When I saw the tarp blown up like balloon I went to take it off, bu the a/c unit shut off just at that time. Ever since - no heat. Here is what I have and what I have done so far - in order to the best of my recollection.
Furnace = Intercity Products - The General 90 - Mfg March 1992
Controller = White Rodgers 50a50 110 - No light lit or flashing at all
Thermostat = Maple Chase programmable
A/C unit = Split System AG Series
I first tried shutting the thermostat off for a few minutes - then swiching it to heat/auto and upping the temp. - Nothing at all.
I checked the fuse box - no breaker tripped.
I turned the main power switch to the furnace off for about 20 minutes and back on - nothing at all.
I checked the controller - no lights blinking at all. Put panel back on and power back to unit. Still nothing happening at all.
I reset the themostat - both by using the reset button and then removing batteries - nothing happens.
I tried flipping the breaker in the main electrical panel just for grins - flipped it back on after 5 minutes. Still no light on controller - no action at all.
Looked for a fuse of any kind anywhere in the furnace - could find none.
I then searched the web for 2 hours and read countless forums - lots of talented people - none with my condition.
My novice guess is either the controller is fried completley or there is a fuse I can't see or there is a wire that broke (like a fuse) when the AC unit over heated.
These are my questions - is there a secret reset fuse somewhere? Does this sound like a power issue? Does the AC unit have to be in working order for the furnace to get power? Could the AC potentially overheating have fried something in the furnace/controller? If this is a power source problem what is these easist way to check it? I am not a super handy guy - but I can follow steps if they are fairly clear and have some degree of detail.