Electric furnace turning on and off constantly

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Old 03-19-13, 11:00 PM
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Electric furnace turning on and off constantly

Hi we have a frigidaire electric furnace. When the furnace is on it turns itself on and off constantly to get the house up to the temperature we have the thermostat set on. It is causing our electric bill to be extremely high.
We have bought a new thermostat and installed it thinking that may have been the cause, although it is still doing the same thing.
We also have put in a new furnace filter, still no change.
Any ideas please???
The model # is B3BM-036K-B.
Thank you for any help you may have.
 
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Old 03-19-13, 11:33 PM
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Welcome to the forums.

Is that heatpump system or just an electric furnace ?
 
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Old 03-20-13, 06:48 PM
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What is the make/model of t-stat? If it's a new Honeywell, they may of set it up to electric heat cycling and we can change that to make it run longer and shut down longer.
 
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Old 03-21-13, 12:09 PM
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I believe it is just a regular electric furnace.
 
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Old 03-21-13, 12:14 PM
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The thermostat we just installed is Honeywell and the model # is CT31A1003.
 
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Old 03-21-13, 07:22 PM
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That is a pretty basic stat.... On page 5 move the adjustment level to 0.8.
 
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Old 03-24-13, 09:20 PM
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Thank you. I will try that. Although I don't know what you mean. Can you possibly explain it, or explain exactly what to do? I don't know what you mean by page 5 either. Sorry I am completely lost when it comes to this. Thank you.
 
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Old 03-24-13, 09:31 PM
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If you have the instruction book that came with the thermostat it shows a picture of the inside of your thermostat and what Jay wants you to change on page 5.

If you don't have the book...click on the link and look at page 5.

Honeywellstore-thermostat-operating-manual.pdf
 
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Old 03-25-13, 08:26 PM
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We changed it to the 0.8 like Jay said. Although it is still turning off and on. Any other suggestions? Thank you for all the help you guys have already done too.
 
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Old 03-26-13, 03:54 AM
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Sounds like something wrong with the stat if it still cycles often with the longer setting.. There's no vent, lamp or TV next to the t-stat?
 
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Old 03-26-13, 05:42 AM
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For many thermostats you can hear the thermostat relay click when it opens / closes - which might inform you whether it's actually the thermostat that's the cause.

In my air handler, each heater coil has a thermal cutout that interrupts the current to the heater and signals the control board of an overheat condition - and one thing the controller can do is shut the system off until things cool down, then try again.
Perhaps there is something causing an overheat condition, e.g. blockage, bad thermal switch, etc.
Have you looked inside the handler / furnace ?
 
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