Thread: thermostat

Had a friend that wanted me to look at why his furnace would not come on the other day ( like I am a HVAC guy now that I am a Home Inspector). The thermostat had no on/auto on it. I was confused by this. It was a small two burner gas furnace. Just curious! Thanks.

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What kind of Stat? A round Honeywell T87 without a cooling sub base doesn't have any switches on it. Lots of the older non-programmable heat mode only stats don't have any switches.
Did you check for 24V across the stat or at the furnace? Is this a newer older unit. Check for blinking lights on a newer unit. Could be no power, no 24V, bad trans, who knows, lots of possibilities.

Great thanks. It is round old honeywell. It also has no A/C on it. I was just confused why there would be no option on the blower. Thanks a lot.

Originally Posted by Eric Smith

Great thanks. It is round old honeywell. It also has no A/C on it. I was just confused why there would be no option on the blower. Thanks a lot.

Some fan and limit control switches have a manual fan on / off switch that can be controlled at the furnace.

Amazon.com: Honeywell L4064B2228 combination fan and limit furnace control: Home Improvement