Discuss Worcester Bosch help in the Central Heating Forum area at PlumbersForums.net

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Ayy Bee

I have a greenstar 35cdi combi boiler that when the thermostat calls for heat. It will fire up heat to temp and then drop down to 41* on the boiler display and then kick back in again.

I have checked all wiring and the zone valves. What else could it be? anyone seen this before
 

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