I'm new to this forum, and the reason why I'm new here is because I have had three different "professionals" look at my system and they have come to three different conclusions.
What I have: Lennox 125,000 BTU Forced Air Furnace the model number looks to be G20Q3E-125-1. Motor HP 1/3. I have about a 2300 sq.ft house. It is a Category I Central Furnace. (All this by way of the stickers on the inside of the unit.
What I know:
When I push the new switch on the system and it starts up, the heat works great, it does a great job of circulating through the house, and all is fine and dandy.
it stops before it reaches the temperature on the thermostat, and therefore I have to push the switch again. It does not come on automatically.
Other notes, one of the three gentlemen held a carbon monoxide meter up to the system (after he said that there was probably a ton of carbon monoxide coming out of the system and that I shouldn't be in there because I would probably get a headache) and it read a zero change in CO both right by the backflow place as well as on the ground below the backflow place. Therefore I don't think that there's any CO being released and question his reliability.
The PSE&G guy came by and said that the system needed to be serviced by a chimneysweep. However, after flipping the switch today I ran outside and saw that there was heat being released out of the fake chimney that is up there (not my idea, I bought the house in July). And that there is not really any backflow as demonstrated by the third guy who held a match up to the backflow place and it looked like the smoke was going up it.
The carbon monoxide tester guy said that I had a cracked exchange and needed to replace the whole furnace probably next year sometime, the PSE&G guy doesn't want to see me until it's fixed and he can remove the red tag, and the last guy didn't touch anything and is still charging me a visit price which I will pay and will never use him again.
So, what I'm saying is while I don't have a lot of faith in the guys I've used so far, I just want a rough idea of what you guys feel the problem might be so that the next professional that visits and says what you guys thinks it is, I can hire him on the spot and trust his judgement.
Thanks for your help in advance and I'm sorry for the novel...I shoulda been a writer...