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CH Sometimes doesn't come on

Postby citroen » Tue Nov 04, 2008 7:47 pm

I had gas CH installed 4 months ago.Boiler is a Greenstar 28i junior.Thermostat is a Programmable Room Thermostat Wireless Model:RF316/22560.My problem is that sometimes when I put the temperature up,the CH does not come on.The red light does not flash,but the flame symbol on the thermostat comes on.This has happened 3 times in the past few weeks.I don't know if its coincidence but I run the hot water for a few seconds (it works ok),the CH comes on a few seconds later as if something was sticking and running the hot water has unstuck it. Could anyone tell me what is wrong?
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