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Hi, sorry you're having trouble...
Did you prime the trap with water when you re-installed it?
The trap should blow through either direction....that's ok...basically it's like the P trap under your kitchen sink.... the water seal in the trap keeps exhaust gas from exiting within your house...
Without the water seal in the trap, the air proving switch may not be seeing enough pressure to allow it to make and start the ignition sequence.
Thank You Tom,
No I did not prime the trap with water. How much is appropriate and into which port should I fill the trap?
I don't have a pic of your exact trap...(sorry)...rather than remove it from your furnace..I would try disconnecting one of the hoses (maybe off of the flue collector box)..and pouring a cup or so of water in it...You can't put too much in...the excess will just run out to the drain.
Filled as directed through the flue side port till it came out the dump side. Retired the power with no change. The draft fan comes on but no spark from the igniter and no solenoids fire on the gas valve.
Have you tried blowing out the rubber tube connected to the air pressure switch? It sounds like something is clogged not allowing the pressure switch to make..
Will do...back shortly...
Sorry for the delay... All tubes from the draft pressure switch are clear and flowing freely. Still no sparking from the igniter and no solenoids on the gas valve.
The draft inducer is running?
Do you own a volt meter?
Sorry we couldn't get this worked out... I have to leave. I'm going to opt out and see if another tech will pick this up where we left off.... He will be able to read our conversation so you won't have to repeat everything. Thanks! Tom
You bet! I have 24AC on the two orange wires: 1) from main blower control board and )2 from the draft pressure switch board. No output from igniter on the white, brown, or blue wires to the gas valve.
I have to leave also to go to a funeral service in 20 mins....back at you later
Ok..just reply back and someone will pick this up..
Back from the funeral...if you are available we can go over some more options.