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Unless this was a supercede, that was most likely NOT a good idea....

Agreed. It was over the phone, I told her we would need to look at it. She informed me of her homeowners insurance and I quickly and politely informed her it would not be us coming out.

Lady called in wondering what the bP flashing on her hunter thermostat meant. I have had no luck finding any info on these stats. Anybody have any ideas?

True, on this particular Trane, the board controlled gas valve on its own mini circuit, per the 12 pin plug.

Removed existing wires from gas valve. Used jumper from r and jumper from common. Once board gave call for gv, manually gave gv 24v from terminal block on board.

Not sure if this is a good thing...

We actually did that on this one. Took 24 v from board to valve, fired gv and ran without issue. Allowed us to rule out any issue w gas valve. First time I have done this, it also allowed us to run...

Yes, sadly I assumed the heat x had been checked during pm, but not the case. I had not jumped out that limit, my fault there. I think an existing problem was aggravated when the pm was performed,...

Follow up:

Went back, all indicators were bad gas valve. Removed old gas valve, before installing new valve I hooked up low voltage to it. It worked correctly, so I installed. Once installed,...

Nest stats are a joke if you have anything more than a basic system. Hook it up to a heat pump or a geo and it has no clue what the most efficient way to operate is.

In response to all of the above advice:

Normal flame sensor rod.

I have jumped out the stat, but not the pressure switch - I will try that.
I understand that these things can happen faster...

One of our guys performed pm on a two system house, got a call a day later that the second floor system wasn't working/keeping up. He worked on it for a while, I was told to go see if I could figure...