Warmflow High Limit Thermostat (HLT)


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SKU: 629 MPN: Warmflow 281 Categories: ,


The High Limit Thermostat is a safety device which trips out when boiler water temperature approaches 100 °C.

The most likely cause of this is poor or no circulation – check there is a heat load connected to the boiler and that the pump is functioning. Another cause of an overheat could be air in the water jacket – ensure the boiler water pressure is sufficient and that all the air has been bled out of the boiler.


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