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6 month old greenstat 18RiErP developed intermittent fault will not shut down when there is no demand from either hot water or radiators / room thermostat. Water tepm reaching 90 rads too hot to touch

BG eng. Confirmed fault from supplied video but could not I'd cause. Confirmed their thermostats working and three way valve OK.recommended keeping diary. Only way to stop boiler is cut mains power. Reconnect and fault clears till next occurance. Now happening min once a day.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

kma836
  • 7 Answers

SOURCE: boiler overheating

the problem there a relay stuck or thermostat bring on the pump & you can lower your high limit aquastat!! also the flow valves can bypass hot hot water risers time to put in a seperate water heater domestic coil are not energy efficient !!!! aquastat high limit set @ 180f deg low limit set @ 140f deg!!!
good luck!!! tim

Posted on Oct 18, 2008

  • 2 Answers

SOURCE: HOW DO YOU PURGE OR RELEASE AIR ONCE YOU REPLACE RADIATOR, WATER PUMP AND THERMOSTAT?

Let the engine cooldown,then open the bleed screw on on the thermostat house,do not remove just loosen----fill water in the radiator bottle slowly and watch for water coming out of the bleed screw----
sometimes the bleed screw is blocked due to anti-freeze-then take the screw off completely ,clean and replace----always make sure the engine is cool

Posted on Jun 15, 2009

  • 1 Answer

SOURCE: no hot water when heating tempreture reached

I have a triton opal shower.

I turn shower on low pressure and cold water. then no low pressure and piping hot water for a very short time then low pressure and cold water.

I've changed the solenoid and the little black plastic ball.

Help !

Posted on Mar 21, 2010

  • 2 Answers

SOURCE: Thermostat and reset button (GIANT 152ETE) - no hot water

I have the smae problem but my element on top works fine it is the element on the bottem that does not go on so what is it that i have to change the element or the thermostat. on the bottom or the one on top. I have voltage on the top but none on the bottom element and are they suppose to go on the same time.

Posted on Apr 16, 2010

nova2nv
  • 197 Answers

SOURCE: on john deere 345 18 hp kawasaki liquid cooled

Water pump gear or the water pump impeller could have failed. If its the pump and due to it being at the bottom front side of the engine it would take some time for it to boil due to the fan is always pulling air down thru the radiator and its at the very top of engine. Cool water on top and really hot coolant around the cylinder with sensor. I'm sure it's the pump.

Posted on Jul 19, 2011

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