Bad Thermostat?

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Kungur
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Post by Kungur » Sun. Dec. 25, 2022 11:27 am

This morning I was checking the boiler,KA2, and I notice that the circulator for our main zone was not running. So I had my wife adjust the thermostat while watched the relay. Nothing even advancing the stat all the way up. So I put a jumper on in the panel.
So I do I determine if the thermostat is bad?

 
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davidmcbeth3
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Post by davidmcbeth3 » Sun. Dec. 25, 2022 11:39 am

What model thermostat ..l have link to operating manual ?

 
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nepacoal
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Post by nepacoal » Sun. Dec. 25, 2022 11:45 am

If the zone worked when you added the jumper, either your thermostat is bad or the wiring to the thermostat is bad...

 
Kungur
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Post by Kungur » Sun. Dec. 25, 2022 11:51 am

Just had a thought after I ate a gingerbread cookie! Would checking continuity determine it?

 
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davidmcbeth3
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Post by davidmcbeth3 » Sun. Dec. 25, 2022 12:55 pm

Kungur wrote:
Sun. Dec. 25, 2022 11:51 am
Just had a thought after I ate a gingerbread cookie! Would checking continuity determine it?
Checking from where to where ?


 
Kungur
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Post by Kungur » Sun. Dec. 25, 2022 1:00 pm

I was the on the stat itself.

 
Kungur
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Post by Kungur » Sun. Dec. 25, 2022 1:01 pm

Or I could disconnect the wires at the relay

 
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Rob R.
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Post by Rob R. » Sun. Dec. 25, 2022 2:00 pm

Disconnect wires at the thermostat and jump them. If the relay engages as expected, your thermostat is faulty.

 
Kungur
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Post by Kungur » Sun. Dec. 25, 2022 2:17 pm

Rob, with my wife's help I did just that. Thermostat is bad. HD has them. So tomorrow....
Merry Christmas!

 
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Retro_Origin
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Post by Retro_Origin » Sun. Dec. 25, 2022 3:49 pm

Kungur wrote:
Sun. Dec. 25, 2022 2:17 pm
Rob, with my wife's help I did just that. Thermostat is bad. HD has them. So tomorrow....
Merry Christmas!
Also be aware some thermostats like the Honeywell white round ones have a short cycle protection feature depending on which type of fuel setting you have the switches set for. This drove me nuts at our apartment because once the temp was met, if you were still chilly and tried to turn it up a freckle you had to wait ten minutes or so till it would finish its cycle. Digital thermostats are not to my liking, my house takes too long to recover from setbacks anyway so I just set and forget the ol mercury style treats me fine!


 
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WNY
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Post by WNY » Mon. Dec. 26, 2022 9:02 am

Mine was acting up too (digital), batteries were getting low, changed batteries, then when I went to clip it back on to the base, it didn't latch correctly and make contact with the front cover and stove only went to idle, thermostat said 65 but was only 55. I finally figured got it electronics section clipped onto the base and seems to be holding good temp now.

 
Kungur
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Post by Kungur » Wed. Dec. 28, 2022 11:23 am

New thermostat work! Now the weather is warming up!

 
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davidmcbeth3
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Post by davidmcbeth3 » Wed. Dec. 28, 2022 2:05 pm

Kungur wrote:
Wed. Dec. 28, 2022 11:23 am
New thermostat work! Now the weather is warming up!
Set at 5000F to test ?

 
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freetown fred
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Post by freetown fred » Wed. Dec. 28, 2022 2:14 pm

Good fix K. :)

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