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Help with floor heat

I have mine set to kick on at 32°. So, in theory, the slab will be warmer than outside air as the temperature drops. The heater should warm the slab from there. Does yours kick on by a T-stat based on outside air temp. I have mine set to come on using the secondary output on the weepmiser.

BTW..Glad you figured it out.
 
I have mine set to kick on at 32°. So, in theory, the slab will be warmer than outside air as the temperature drops. The heater should warm the slab from there. Does yours kick on by a T-stat based on outside air temp. I have mine set to come on using the secondary output on the weepmiser.

Mine does kick on based on outside air, just like the weepmiser.
 
Where is your temperature probe at? If its in one of the bays, it could be seeing a higher temperature than what the outside air temp is? I remember when I had my weepmiser sensor in the bay, It was sometimes off by 6° or more depending on how fast the temperature dropped. Moving the sensor to the north wall under the overhang solved all my temp sensor issues.
 
Slash,

Happy to hear of your solution! Wishing I'd thought to suggest that possibility.

I suggest you have the gas pressure checked, along with flue gas temperature and combustion air…(have you ever felt light-headed while working in the engine room?)

Sooting of the tube bundle indicates low gas pressure, insufficient flue temperature resulting in flue condensation, low glycol return temperatures, and/or insufficient combustion air.
 
Slash,

Happy to hear of your solution! Wishing I'd thought to suggest that possibility.

I suggest you have the gas pressure checked, along with flue gas temperature and combustion air…(have you ever felt light-headed while working in the engine room?)

Sooting of the tube bundle indicates low gas pressure, insufficient flue temperature resulting in flue condensation, low glycol return temperatures, and/or insufficient combustion air.


I will check those out. Thanks again for all of your help!
 
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