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    jackiekrankoskie's Avatar
    jackiekrankoskie Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 1, 2009, 05:02 PM
    Why does the surface of my Honeywell thermostat get so hot?
    I put in a replacement thermostat, Honeywell RLV310, and the surface gets very hot. Any ideas, or it this OK?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Dec 1, 2009, 05:06 PM
    Don`t think I would use it till I found out why,, I would double check the installation,, make sure all the connections are tight,,
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #3

    Dec 1, 2009, 05:34 PM

    If it has the backlight on all the time, it will get warm. It's best to leave it off.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Dec 1, 2009, 05:39 PM
    That is a line voltage thermostat. Make sure all wiring connections are tight.

    Honeywell RLV310 Digital Manual Baseboard Heat Thermostat
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #5

    Dec 1, 2009, 05:52 PM

    If it's a line voltage stat, then loose connections will definitely do it. If the connections are clean and not discolored or can be cleaned up and tightened, you should be OK too.

    If the internal contacts are pitted, then the stat should be replaced. You won't be able to tell this, but a voltmeter used properly could.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
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    #6

    Dec 1, 2009, 06:34 PM
    It is a replacement stat so the contacts should be OK but you never know.
    cdecker's Avatar
    cdecker Posts: 1, Reputation: 1
    New Member
    		  
    #7

    Dec 21, 2009, 09:55 AM
    I have baseboard heat throughout the house and have 6 of the RLV310's installed and the side of the thermostat gets warm, but not hot when the thermostat has the heat on. If you take the cover off the thermostat, you'll see a giant heat sink that occupies almost the entire portion of the unit to the left side of the LED screen. I think that the heat you're experiencing is just a result of the thermostat's heat sink doing its job, but if you are concerned, you should call a licensed electrician to check it out.
    EPMiller's Avatar
    EPMiller Posts: 624, Reputation: 37
    Senior Member
    		  
    #8

    Dec 21, 2009, 09:08 PM

    That is a TRIAC switched thermostat. They will get warm, but they shouldn't get HOT unless something is wrong. The heat sink is why they are so big. I don't really like them. To me, mechanical switches are much more reliable.
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