I am looking for an *educated opinion *from an HVAC Guru, please…
I have already called for a service tech, and he will be here this afternoon. I am just trying to get an opinion so I can lessen the risk of getting taken to the bank. HVAC is my weakest area, so please excuse me if my terminology or assumptions are incorrect.
(Owned home for 3 years)
Unit serviced when home purchased
General inspection performed monthly
Air filter replaced approx every 2 months
Last serviced 10/2008 (air flapper replaced at that time)
On Thanksgiving afternoon, the unit shut-down, and would not respond to thermostat controls. Opened the access panel, and the green light on the control panel was lit. Inspected air filter, and was as new. Did not see any signs of burnt wiring, or other problems. I turned off the disconnect for about 15 seconds, and re-turned on. Unit started and operated normally. Decided to monitor situation, hoping it was just a fluke.
Early this morning, (2 am), the unit shut-down again. I performed what I did above, but this time no response. Turned on our portable space heaters and went back to bed.
This morning, (7am), I tried to reset the unit again. This time when I turned the power back on, I could hear what I assume was the draft inducer fan starting-up during the purge cycle. after about 10 seconds, I noticed the fan limit dial begin to move. After a total of approx 20 seconds, I heard another component (gas valve opening for ignition??) try to start-up and after 1 or 2 seconds, the entire unit shut-down. Control panel green light still lit.
Re-try… same as above. No response.
Called for service tech.
Re-try… unit started and is reponding. Currently maintaining temp.
Any help would be greatly appreciated.