Latest Discussions : HVAC

Tom Hanrahan

05:44PM | 11/09/14
Member Since: 12/28/02
24 lifetime posts
We have two HVAC systems: one is a forced-air Carrier LP furnace and the other is an outside combo gas/AC unit by Janitrol (Goodman). It was installed in 1995.

Several years after installation, I bought tow Hunter programmable thermostats and installed them on both systems. Both thermostats worked well for several years until one day I noticed the sound of a fan running constantly inside the Janitrol unit. If I recall correctly, it is a fan that kicks on before and runs after burner ignition in order to clear exhaust gases from the unit.

The HVAC service guys spent and hour or so trying to determine why the fan wasn't shutting down and concluded the Hunter thermostat was the problem. They re-installed the original mercury switch thermostat that had come with the Janitrol unit.

I bought a new Hunter thermostate, installed it, and the fan ran constantly again. I called the HVAC guys, and they said they would return with one of the programmable thermostats they sold in their shop.

They never returned despite my repeated calls for them to return. I finally gave up and have used the old thermostat all these years.

Now I want to install a programmable thermostat to automatically regulate heat and air in that portion of the house.

What to do? I believe the problem lies with the Janitrol unit, not the thermostat.

Why did the programmable thermostat function well for several years before the problem arose?

Should I try a new thermostat or try another HVAC service company?




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