Heat no shutting off


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Old 11-13-07, 09:04 AM
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Heat no shutting off

I have a two zone oil burner system, forced hot water. The second zone will come on but not turn off at the preset temp. I have to lower the thermostat in order for the heat to shut off. I replaced the thermostat and it is still happening.
Any suggestions ?
Thanks in advance.
 
  #2  
Old 11-13-07, 03:23 PM
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Are you zoning with individual circulators for each zone ? or, with one circulator and electric zone valves ? Perhaps one of those zone valves is hanging open ?
 
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Old 11-13-07, 05:18 PM
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Originally Posted by redmm
I have to lower the thermostat in order for the heat to shut off. I replaced the thermostat and it is still happening.
Any suggestions ?
Thanks in advance.
Well, you must not be reaching set temp on that zone, otherwise you would not be able to manually turn it off by turning down the setting, either.
 
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Old 11-13-07, 05:39 PM
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again, that's what I get for not reading carefully !

ecman, I'm puttin' you on the payroll! thanks...
 
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Old 11-13-07, 06:08 PM
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Trooper,

We all miss key statements. I think what it is is that we quickly read a post and think we have the jist and want to quickly respond.
 
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Old 11-13-07, 09:25 PM
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I used a heat gun and the temp is above the setting which is driving me bonkers. Put heat to 64 room temp was at70 before I turned it off my self.
 
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Old 11-13-07, 09:58 PM
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Has it always done that?
 
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Old 11-13-07, 10:03 PM
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Is the thermostat on a cold wall ?

Is cold air leaking out of the hole behind the thermostat where the wires come through the wall and chilling the thermostat ?
 
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Old 11-14-07, 11:15 AM
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Here is another key point: Are you turning the thermostat to some (systems)"Off" setting, or have you just been turning it way down (in the interpretation of "off")?
 
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Old 11-14-07, 12:09 PM
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Are you zoned using separate circs (pumps) or is it zoned using zone valves?

What temp does your temp gun show when you shoot at or near your t-stat?

Has it always done this? If not, was anything done to the system around or just before the time you first noticed?
 
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Old 11-14-07, 03:35 PM
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Originally Posted by redmm
I used a heat gun and the temp is above the setting which is driving me bonkers. Put heat to 64 room temp was at70 before I turned it off my self.
You saying that you took one of them hot air heat guns and blew it at the t'stat and it still didn't shut off ?
 
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Old 11-14-07, 09:18 PM
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Originally Posted by Who
Has it always done that?
Noticed it the end of last year,
one recirc pump with two zone valves,
checking the temp with a heat gun at the thermostat,
turning the thermostat down till i here a click heat Bioler shuts off 30 seconds later.


Is the thermostat on a cold wall ?

Is cold air leaking out of the hole behind the thermostat where the wires come through the wall and chilling the thermostat ?
This I have to check but its on an inside wall so I doubt it.
Sorry I wasn't to clear here, working midnights and trying to write this. need more of this lol
 
 

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