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Have a Buderus GB142. In heating mode, temp indicated only…

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Have a Buderus GB142...

Have a Buderus GB142. In heating mode, temp indicated only gets to about 110-120 F even though dial setting is at 170 F. Circulators work, but not enough heat in fluid to meet demand fron thermostat. Any thoughts?

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

Shut off/reset thermostats. Air flow is good.

Contractor's Assistant: Do you plan on doing the work yourself?

If possible, yes.

Contractor's Assistant: Anything else we should know to help you best?

Try this. Heat pumps were installed w/o low temp cutoff. Boiler was supposed to be supplemental. I have shut off breakers to heat pumps (air handlers still on) and thermostats are in "emergency " mode.

Submitted: 1 month ago.Category: HVAC
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Answered in 2 minutes by:
12/29/2017
HVAC Technician: Rick, HVAC Supervisor replied 1 month ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 23,395
Experience: 40+ yrs. experience as a licensed oil & gas technician.
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Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your

issue. First I’ll need some more info so I have a more complete picture of your situation.

Does the burner shut down or run continuously?

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Customer reply replied 1 month ago
runs continuously
HVAC Technician: Rick, HVAC Supervisor replied 1 month ago

Then the boiler is undersized and can't keep up with demand. If you have programmable thermostats it's best to override program and hold ~70 around the clock when weather is this cold. Systems are not designed to make up the temp rise from an overnight setback in extremely cold weather.

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