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Hi Guys Followed your advice and bit the bullit and purchased a new PCB didnot work at first try but a quick call to the Heat team revealed that after fitting a new PCB you have to hold the reset switch for 30 secs to activate. Boiler then ignited and alls well. many thanks for your help much...

Hi I am using a 10 amp 1 to 9 Volt DC variable power supply connected directly onto the Gas supply coil

Hi Guys thanks for the help It would appear that the gas flow is ok as I can control the Flame by manually regulating the voltage at the gas valve coil. Do you think it could be a fault with the PCB as i can only get 1.5 volts all the time at the valve coil or is it something else that is...

Hi Bob thanks for the info yes the votage starts at 1.5 volt but doesnot inrease at all. If I Supply 2 - 9 volt from an external power supply then the Valve modulates ok and all works fine. I have replaced the Safety Thermostat but this has not made any difference Cheers Mike

Help Please my Baxi combi 105E Fires up no problem but Temperature very slow to rise.When running only have 1.5 volts at the modulating coil on the gas valve.If I give this valve 9 volts from an external source then the flame goes high and the Temperature rapidly increases.but will not modulate...