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Old 10-20-2009, 04:57 PM   #1
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Electrical Baseboard Thermal Protection


Is it possible that over the years (25), the thermal protection switch gets weak and trips constantly?

I've noticed this problem since I installed digital thermostats throughout my home. A "Low Power" message appears off and on when the heat ramps up in the evening, this can only be caused by total power lost, which is not the case, or the thermal protection trips (for no reason)

This only happens on 2 of the 10 heaters I have. At first I thought the thermostat was the problem so I replaced it on one of the faulty baseboards and the problem still appears.

So if the thermal protection switch is weak, I'll start changing my baseboards throughout the house, they are pretty old after-all.

Any other suggestions?

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Old 10-20-2009, 09:23 PM   #2
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Electrical Baseboard Thermal Protection


What is the model of your thermostat?

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Old 10-21-2009, 05:30 AM   #3
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Electrical Baseboard Thermal Protection


Quote:
Originally Posted by williswires View Post
What is the model of your thermostat?
Honeywell RLV4300 5-2 Day Programmable
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Old 10-21-2009, 06:21 AM   #4
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Electrical Baseboard Thermal Protection


I would love to have an Amprobe handy to see how your BB units are behaving.

It sounds plausible that the thermo cut-out is acting up and disconnecting the unit causing the symptoms you have described.

Try replacing one of the offending units, and see if you obtain desirable results.
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Old 10-21-2009, 06:33 AM   #5
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Electrical Baseboard Thermal Protection


I'm almost certain it is. Right before I'll see the "Low Power" message I hear a big <<Click>> from the BB. After a few minutes I hear another <<Click>> and the message disappears.
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Old 10-22-2009, 05:51 AM   #6
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Electrical Baseboard Thermal Protection


Yup. That click is the thermo cut-out. You could replace the cut-out IF you could find a new one. Or replace the entire unit, as originally stipulated.

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