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Posted by RBM on October 5, 2006, 7:05 am
If the "boiler" has a domestic coil for hot water, it will maintain tank
temperature via an aquastat in the water jacket
>
>> Beyond the electrical possibilities that Ed described, it could be
>> plumbing. If you have a coil in the boiler for hot water, and two
>> circulator pumps for the heat zones, you'll also have flow check valves
>> which can leak hot water through the line. You may have zone valves in
>> the system, which can stick in the open position and cause hot water to
>> leak through
>
> Since the furnace won't fire unless something is calling for heat/hot
> water you can probably rule out the zone valve or check valves, correct?
> Could be thermostat or the controlller on the furnace maybe....? Do you
> have a presuure gauge and is it showing a higher pressure then normal?
> Anything leaking from expansion tank(s) or relief valve(s)?
>
>
>>
>>
>>> Hello all,
>>>
>>> I have an older boiler and both downstairs and upstairs thermostats are
>>> set to 60. However, the thermostat reads just a tick under 80. The
>>> pipes/radiators feel very warm. Is there anything I can do to correct
>>> this, short of turning off the boiler? I would like to get this
>>> working properly myself, but do I need to call a professional?
>>>
>>
>>
>
>
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