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Calydra Comfort 28 FF Heating is not working, however hot water works fine!! Help

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JuanCarlos

Hello experts, desperately looking for some help/advice.

I have a problem with a C & M Calydra Comfort 28 FF combi, the DHW works flawlessly however the central heating does not work. There are no error lights (leds) on the dash indicating any problems therefore I don´t really know what could be preventing the central heat from starting. I have changed the thermostat, drained the heating circuit, and reset the boiler, however the problem persists. I have also placed the boiler in heating mode (with DHW off) and the same... no central heating.


¿Is there a way to test if its the PCB or the 3 way valve? or something else... The boiler does not make any attempt to start when the central heating thermostat is turned on.

Thanks in advance for your help,
greetings from Madrid.
JuanCarlos
 
You'll need an engineer with the relevant spanish gas qualifications to look at it.
 
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