3M Filtrete Thermostat clicking frequently


Old 01-22-14, 07:38 PM
Thread Starter
Join Date: Mar 2009
Location: Northern Virginia
Posts: 4,097
Received 9 Votes on 7 Posts
3M Filtrete Thermostat clicking frequently

My Filtrete 3M30 programmable thermostat has been clicking more frequently than usual since the temp outside has dropped into the teens. I'm assuming it's a relay that turns on the auxiliary heating coils because it occurs when the ambient temp is three degrees below the set temp. However, I don't understand why it would be clicking on and off so frequently--sometimes two or three times per minute. I have to imagine there is supposed to be at least a degree of swing before it turns the aux. coils back off. It's as if the relay is turning on at 3 degrees difference, then back off at 2.9, then back on at 3, off at 2.9, etc., which is causing it to cycle way to often. Is this possible?
Old 01-23-14, 10:07 PM
Jay11J's Avatar
Join Date: Sep 2001
Location: Rochester, Minnesota
Posts: 18,427
Received 0 Votes on 0 Posts
I have not been around this stat, so I couldn't help you here.. sorry..

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: