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garage heat thermostat problem
- Thread starter max wedge
- Start date
mike944
Well-known member
sounds like you might have installed an air conditioning thermostat, instead of a heating thermostat. Either that, or you have a heating AND ac thermostat, and have connected the heater to the A.C. connection.
I didn't know there was just an air conditioning one. I don't think its a heat/ac one, I'll check when I get home tonight. thanx!mike944 said:sounds like you might have installed an air conditioning thermostat, instead of a heating thermostat. Either that, or you have a heating AND ac thermostat, and have connected the heater to the A.C. connection.
mike944
Well-known member
A heating thermostat closes the contacts (turns on the device) when the setpoint (desired etmperature) is above the room temperature. As you turn it up, the device goes on.
An air conditioning thermostat closes the contacts when the setpoint is below the actual temperature. Turning it down turns on the device.
An air conditioning thermostat closes the contacts when the setpoint is below the actual temperature. Turning it down turns on the device.
I looked at the wiring last night and moved one wire, now it works. But I still need to figure out how to get the fan to stop, it's not wired correctly or it's not wired into the thermostat, the guy who had the shop before me cobbled it pretty bad.mike944 said:A heating thermostat closes the contacts (turns on the device) when the setpoint (desired etmperature) is above the room temperature. As you turn it up, the device goes on.
An air conditioning thermostat closes the contacts when the setpoint is below the actual temperature. Turning it down turns on the device.
mike944
Well-known member
if the thermostat has a "fan" switch, off/auto/on, then the fan should be wired separately to the thermostat, and there should be a separate control relay circuit.
if the thermostat does not have such a switch, the fan should be wired to the same control circuit as fires the burner, so it only runs when the burner runs. Sounds like the fan might be wired straight to the power line, so it's always on. There's nothing inherently wrong with connecting it that way, as long as you don't mind the fan running all the time. You'll actually be able to extract a slightly larger amount of heat out of whatever fuel you're burning, during the "cool-down" part of the cycle. Of course, this is at the expense of increased power consumption, and noise.
Unfortunately, if it's been "cobbled" together, all bets are off. It could be completely F'ed up. Your best bet is to scour the internet for a wiring/connection diagram for your heater, and redo EVERYTHING. If it's cobbled together, and doesn't work properly, someone obviously had no clue what they were doing, and the quality of connections is probably poor, and could be a dangerous situation.
if the thermostat does not have such a switch, the fan should be wired to the same control circuit as fires the burner, so it only runs when the burner runs. Sounds like the fan might be wired straight to the power line, so it's always on. There's nothing inherently wrong with connecting it that way, as long as you don't mind the fan running all the time. You'll actually be able to extract a slightly larger amount of heat out of whatever fuel you're burning, during the "cool-down" part of the cycle. Of course, this is at the expense of increased power consumption, and noise.
Unfortunately, if it's been "cobbled" together, all bets are off. It could be completely F'ed up. Your best bet is to scour the internet for a wiring/connection diagram for your heater, and redo EVERYTHING. If it's cobbled together, and doesn't work properly, someone obviously had no clue what they were doing, and the quality of connections is probably poor, and could be a dangerous situation.
Do you mean wire the fan to the same relay as the burner? I was considering that but wasn't sure if that was ok.mike944 said:if the thermostat has a "fan" switch, off/auto/on, then the fan should be wired separately to the thermostat, and there should be a separate control relay circuit.
if the thermostat does not have such a switch, the fan should be wired to the same control circuit as fires the burner, so it only runs when the burner runs.