I have a greenstar highflow 440 boiler. the red alarm light is on constantly and i cannot override it When I use the restart button the central heating will run for about 10 mins then cuts out. the hot water is ok.
The red warning light is usually associated with a dirty sensor in the gas ignition system, so that correct combustion is not being recognised. The sensor needs a quick clean if you can get access to it.
Iengine
February 2011
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