Back to this thread again as the heater will not fire up. Camped up at 11.5k feet and the heater would not fire up and neither would the water heater. I was told at purchase that I have the high altitude kit and to use it, flip the lighted switch and all would be good. Now I wonder WTF I really have. I think the little thingie second from left is the altitude sensor but now not sure it's wired correctly per below.
Still could not get it to fire again once we got back home but during many, many start sequences it did manage to get a lot of gray smoke from the exhaust.
The guys at Thermo-King PHX overstepped what I wanted them to do and re-wired the SMB wiring so I now think they f'd it up. Technician said they had it wired up all wrong so he "fixed" it. Of course they did not ask if I wanted them to do that or not but it was done.
Attached is a photo of my setup with the furnace being on the left and the water heater on the right. My wife did get the water heater working and got hot water out of the faucet so that makes me think the heater is jacked up. Thermo King Denver guy says he will take it all apart and sandblast it clean and put in all new stuff so looks like a trip to Denver soon.
I am going to try to get underneath and disconnect the air inlet pipe and blow it out to see if by chance it is clogged up as the error code "could" be lack of fuel or lack of air.
Any comments on operation with this setup? Worked before.