Gas and Oil Home Heating Furnaces - Gas Furnace not working trips breaker
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BuzzDroopy
06-18-06, 12:03 PM
Hi all I'm a newbie at this so please bare with me!
Have a York forced air gas furnace that's about 18 years old. When I go to turn it on either at the thermostat or power switch near unit, the circuit breaker trips...no pilot, no power, zilch!
Short history: I had to replace the spark-ignitor and ignition-control unit this winter when the pilot would light, activate the blower, then shut off. Just changed the blower motor in February when the old one would just hum after pilots lit, and fan relay would trigger. Removed the transformer and coil: replaced the coil, transformer checked out fine. Still nothing. Please help hot in Michigan!!
Have a York forced air gas furnace that's about 18 years old. When I go to turn it on either at the thermostat or power switch near unit, the circuit breaker trips...no pilot, no power, zilch!
Short history: I had to replace the spark-ignitor and ignition-control unit this winter when the pilot would light, activate the blower, then shut off. Just changed the blower motor in February when the old one would just hum after pilots lit, and fan relay would trigger. Removed the transformer and coil: replaced the coil, transformer checked out fine. Still nothing. Please help hot in Michigan!!
DaVeBoy
06-18-06, 05:13 PM
Does it blow the breaker immediately? Will it do it when put in the modes for heat, cool, or fan only?
Make sure of the obvious that you don't have some wire touching bare metal, like say at the blower door's interlock switch, which is the first place beyond the on-off switch that the power is routed to. Then after that, look at all wires/connections to make sure nothing is touching bare metal. Then after that, I would make sure that you wired the 4 wires of the transformer correctly. Please report back.
See if it will short out with the blower door left open. Then see if it does it when the outside breaker for the central air condensor unit is turned off for the fun of it...to narrow this down.
Make sure of the obvious that you don't have some wire touching bare metal, like say at the blower door's interlock switch, which is the first place beyond the on-off switch that the power is routed to. Then after that, look at all wires/connections to make sure nothing is touching bare metal. Then after that, I would make sure that you wired the 4 wires of the transformer correctly. Please report back.
See if it will short out with the blower door left open. Then see if it does it when the outside breaker for the central air condensor unit is turned off for the fun of it...to narrow this down.
BuzzDroopy
06-18-06, 07:57 PM
Yes it blows the breaker immediately, and in all modes heat, cold, fan. The breaker actually was tripping before I decided to remove and check the transformer (labeling each wire & terminal before removing). I'll make sure to check all wires/connections that may be loose or possibly touching metal. For now it does short with the blower door open. Not sure where the outside breaker for the central air condensor is located, other than the main circuit breaker for the furnace?
Grady
06-19-06, 02:27 PM
If it trips the breaker with the blower door open, either the door switch is shorted or you have a problem external to the furnace.
With the breaker turned off, remove the door switch & check it. The next most likely place would be in the wiring as it enters the funace cabinet.
With the breaker turned off, remove the door switch & check it. The next most likely place would be in the wiring as it enters the funace cabinet.
BuzzDroopy
06-23-06, 09:10 AM
Had the energy company come out per funace-protection plan. Turns out the coil that I was sold was wrong, and even though the blower ran when I replaced it, it was mis-wired, as well as the wires in the fan center. So the energy tech rewired everything and replaced the fan center. Everthing works fine, it feels good in Michigan! Thanks for your help guys!