I have a Bryant plus 90 that is not ingiting when thermostat sends request. There are no errors on the LED. When I do component test the blowers ramp up through the tests and I get amber glow in window for about 5-10 sec then everything shuts down.
Make : bryant
Model : plus 90
switch all breakers off and on. power off to Furnace, flow switch off, wait 5 min, flow on, power on.
Hello,when thermostat calls for heat does the exhaust fa come on?
nothing comes on.
Thank you,So a this point the thermostat calls, nothing comes on and the led light remains solid?Billy
Yes, that is correct.
do you mind removing the thermostat top section for a test?
Are you saying you want me to access the thermostat wiring behind the lcd panel?
correct....the wire on R and the wire on W and twist these together.I want to eleiminate items in the circuit anf the first elimination is the thermostat.So twist r and w together and tell me if exhaust starts
Done. exhaust is on.
Thank you,now is the light still solid or flashing?
Led solid. Flame is on.
Thank you.This means the thermostat has batteries that are bad..OR..the thermostat is bad.R and W just bypasses the thermostat. Billy
Thanks Billy! Looks like I need to replace the thermostat, its a Honeywell rth230b. Only a couple of years old but I also replaced the batteries in troubleshooting. I've had intermintent problems for a couple of years but they always seemed to go away after unplugging everything and restarting from go.
Thanks for the hands on....I thank you.Billy
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