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Mend Vaillant 282e Pressure Switch Ignition

first no hot water , now no heating vaillant 282e?

is there muck in the tubes of the pressure switch or is it the micro switch for that white arm behind the pump.
startup sequence is all ok until ignition spark but no flame ????????????????????????????????????????/

phill Venables
November 2009

Vaillant Vaillant 282e Heating, Home Heating Systems Vaillant Pressure Switch Ignition

I think you are right, there is scale on the diafragm on the diverter valve (pressure switch that has 2 microswitches atached), you should use domestic acid to clean it up, I just had similar problem

guido
November 2009

if its trying to ignite then perhaps no gas getting up to burner which could mean faulty gas valve an engineer can diagnose this in a few mins with u gauge attached to gas valve

sean
November 2009

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Vaillant 282e: No Hot Water & Heating - Fix?