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Old 01-04-2010, 11:35 AM   #1
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New therm for electric heat


I want to replace my thermostats for my 110V electric heat. individual per room. Old one's are the round knob looking ones. So i open up the guy and take a peek at the wires and that's where i have the problem. there are 2 blk, (twisted together) 2 white (twisted together), a single black and a single white. Total of 6 wires (4 if you count the twisted ones as one), the programmable thermostat....only has 2 blk.

Only one lowes carries / says its for 110 electric / house is relatively new...3 yrs old.

Any assistance would be great.

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Old 01-04-2010, 12:25 PM   #2
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New therm for electric heat


Can you take a picture and post it?

How do you know it is 110 volts?

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Old 01-04-2010, 12:51 PM   #3
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New therm for electric heat


You are correct that is kind of an assumption, could be 220 right? I will take a picture tonight and post tomorrow, also i'll take a pic of the breaker in the event that helps.


Thanks for the reply, i will post tomorrow.
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Old 01-04-2010, 03:38 PM   #4
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New therm for electric heat


The best so far as voltage and wattage is to look on the "nameplate" (label) on the heater. If more than one heater on the same thermostat, look at the labels on each heater.

There are 120 volt thermostats which have two wires. And 240 volt thermostats which have 4 wires.

The breaker for a 120 volt heater would be a single breaker. The breaker for a 240 volt heater would be two breakers connected together.

And thermostats will be rated to handle a certain wattage.
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