Question about Heating & Cooling
Sometimes thermostat settings are not right on the money. In your case it could be that the furnace is accurate but the house temp could be lower due to a number of reasons. People going in and out, bad insulation, window drafts, or just the thermostat being out of calibration. I think you are just fine with only a 3 degree difference. GOOD LUCK FRIEND.
Posted on Nov 18, 2014
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Posted on Jan 02, 2017
SOURCE: can i hook up a
I would check with your local building codes before investing any money with this issue.
Most companies will do free or cheap onsite bids. They should be able to give you a complete break down of what you might need and the related costs.
Posted on Jul 03, 2008
I have serviced these furnaces for 20 years and I can tell you most of these models did not have diagnostic lite on them. (although some did, especially if the control board has been replaced) The problem is most likely a bad 3 wire pilot. This will cause exactly what you describe. 2 things to consider though. 1, If you were to replace the pilot don't get a cheaper knockoff. In my experience these do not last long at all. Get the right one from a carrier dealer. It will cost more but be much more reliable. 2 What is the condition of the secondary heat exchanger? Most if not all of the sx series had issues with the secondary heat exchangers rotting out and leaking. If the furnace is out of warranty you would be much better replacing the furnace as the cost of replacing the secondary heat exchanger will probably be almost the same as a new furnace. ( those babies are EXPENSIVE!)
Posted on May 01, 2010
SOURCE: Hi I have an xl80
Hi, sounds like you have a problem with the heat anticipator in the thermostat. If you replaced the fan limit, and with it running that long after the burners shut down, it would be in your stat. If it fires up after resetting breaker, was the stat set to call for heat? If not, the stat is faulty. If you remove the front to get to the stat wires, take a jumper wire and jump from RH or RC to W. Heat will start. Let it run for a minute or so and remove wire. If the fan shuts down with in a min. or so, you will know it was the stat. Good Luck and let me know the out come!
A/C, & Heating Contractor
Posted on Feb 11, 2011
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