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Old 09-08-2011, 09:37 PM   #1
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hi i have a boiler with two pumps. one pump, has 2 zone valves and the other pump workes directly through the relay box. basically i have three thermostats in this boiler. lately the boiler started making me problems the pump might work and the boiler wont turn on or sometimes the boiler would work and not stop even the thermostats were suppose to shut of the boiler, zone valve, or the pump. what can be the problem is it a pluming problem or electrical problem?


Last edited by bsirota; 09-08-2011 at 09:39 PM.
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Old 09-09-2011, 06:45 AM   #2
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Generally, the thermostat calls for heat and starts the pump circulating water. The temp drops at the heater and the heater fires up. Sometimes the two functions are not directly connected, often they are. With the thermostat being connected(thru a relay) to the pump and to the heater fuel valve. If it works sometimes, check for loose wiring connections.


Last edited by Just Bill; 09-09-2011 at 06:48 AM.
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Old 09-09-2011, 08:04 AM   #3
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A boiler running wild is an excellent time to call a service technician.
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Old 09-09-2011, 01:43 PM   #4
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Quote:
Originally Posted by Just Bill View Post
Generally, the thermostat calls for heat and starts the pump circulating water. The temp drops at the heater and the heater fires up. Sometimes the two functions are not directly connected, often they are. With the thermostat being connected(thru a relay) to the pump and to the heater fuel valve. If it works sometimes, check for loose wiring connections.
thanks a mil i will check for loose wires
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Old 09-10-2011, 07:33 AM   #5
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Does your boiler also make domestic hot water for your house??
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