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Old 02-18-2011, 04:39 PM   #1
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Electric Baseboard Heater Thermostats


I have installed 8 new Honeywell TL8230 electric baseboard thermostats in my home and I'm finding that for example unless the one in my kitchen area has the heat turned on, the one in my breakfast area which is directly across does not go on that is to say that the thermostat light not on and the digital numbers are not on. Same thing in my upstairs bedrooms and bathroom. Each room has it's own dedicated baseboard heaters. Any ideas what's going on here?

I checked the circuit breaker panel and the kitchen and breakfast area for heat are on the same circuit.
The powder room, guest bathroom and guest bedroom are all on another circuit and the master bedroom and a second guest room are on another circuit.

All the thermostats work when all the heaters are turned on.

Any help is greatly appreciated. Thanks. Ed


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Old 02-18-2011, 05:20 PM   #2
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It sound like some heaters are in parallel with others. Does each heater have only one cable coming into it?

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Old 02-18-2011, 05:27 PM   #3
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The powder room has 3 wires in the box in the wall. The kitchen 3 wires in the box in the wall and the master bedroom has 3 wires in wall.
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Old 02-18-2011, 05:34 PM   #4
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By three wires, I'm assuming you mean three cables. Do you know if these heaters are operating at 240 volts or 120 volts?
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Old 02-18-2011, 05:56 PM   #5
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Yes - three cables in the boxes for the thermostats. All 240V.

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Old 02-18-2011, 06:02 PM   #6
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Electric Baseboard Heater Thermostats


In you post you said the three cables were in a wall box. How were these heaters controlled before you added the thermostats? Are you placing the thermostats in the wall box or are you placing them on the baseboard?
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Old 02-18-2011, 06:09 PM   #7
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These heaters were controlled by single pole thermostats before I added the new Honeywell TL8230s.

I am placing the Honeywells on the wall.
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Old 02-18-2011, 06:27 PM   #8
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Electric Baseboard Heater Thermostats


Sounds like the cable that carries power out to other heaters is on the load side of a T-stat when it should be on the input side.
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Old 02-18-2011, 06:35 PM   #9
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So Jim let me understand what your saying is the two cables that I have connected on the load side one of them is the heater and the other is the other thermostat? I was under the impression that they both should be on the load side.
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Old 02-18-2011, 08:02 PM   #10
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Thank you so much! You guys really know your stuff. All 8 thermostats are now working properly.....
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Old 02-18-2011, 09:54 PM   #11
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Glad to hear it's working. Thanks Jim for keeping this going while I had to go grocery shopping with you know who.....
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Old 02-19-2011, 09:04 AM   #12
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We really appreciate your help. Just paid an electrician $900 to rewire my latest remodel of master bedroom which is beyond what I'll attempt electronically and we are going thru our budget pretty quickly. This house is getting to be 25 years old and starting to need new everything. Have wonderful weekend.

P.S. We woke up this morning to a power outage which hit our area due to high winds. Electricity just went back on and the thermostats held the programming. Glad for that. Thanks again. Ed

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