Jay41
Active member
Who on this forum actually works in the industry?
20+ year tech. here
About 60/40 commercial/residential.

20+ year tech. here
About 60/40 commercial/residential.


Thanks for the replies guys.![]()

lol, it's always the t-stat.![]()
If some one called me a tech I'd slap them. The kid at Jiffy Lube is a tech. I'm a mechanical contractor. Plumbing and Piping Mechanic / craft tradesman.
If some one called me a tech I'd slap them. The kid at Jiffy Lube is a tech. I'm a mechanical contractor. Plumbing and Piping Mechanic / craft tradesman.

People say things like that in my field as well (electrical). I say, call me anything you want as long as those checks show up! LOL!![]()
.Any HVAC guys in the Toronto area looking to do a weekend A/C install this year? I'm also looking for a gas heater for my shop.. if someone knows of a bargain?
Yes, I'm cheap and broke.. bad combination.


Mike the T-stat is not always the answer . Most often if the fan works in heating mode and also works in fan on the culprit is a relay in the furnace that is energised when in cooling mode . The contacts in the relay go bad or become corroded and the relay stops working . I had an old carrier furnace with this issue just last week and see it way more often than I do a bad T-stat.
Rick
I will also verify that that is your problem but I am betting on it. The good news is in the meantime if you need AC you should be able to switch the thermostat from auto to on and get the blower to run it will just run the blower full time instead of just running it while the AC or Heat is on . I have an install going tomorrow so it will most likely be 6PM or so eastern before I get back to you on it Jack. Rick
I PM'd Jack instructions on testing the relay. Also the fan on position can bypass the cooling relay on the board thus meaning he has a new stat and still no AC.
Rick
HVAC Automation Service Tech....automate all the mechanics so you can see room temps and control boilers, chillers, and Air Handlers from anywhere on the world wide web...if, you know the password..LOL!
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Mike although it could go either way there are tests I will walk Jack through before he buys a new control board or Tstat to make sure we get the right component. When I chatted with him through PM earlier he noted that it was a perfect 72* currently at his home and he just wanted to work through this issue before it hits 110*. Jack would not be the first member I have walked through diagnostics on their systems long distance and I asure you Mike I will make sure we have the right part before we go buying any
.
Rick