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Mend Vaillant Hot Water Comes Ok Cold

hot water comes ok but then cold water?

i had vaillant for some time but recently hot water come on and then after sometimes cold water start coming

joe
August 2011

Vaillant Heating, Home Heating Systems Hot Water Comes Ok Cold Water

what make sine 18 824 831 etc hot water heat exchanger
need look into replace it

lal
August 2011

A model would help!
My powers of psychic readings is on the wane of late!

Carefree
August 2011

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Vaillant Hot Water Cold - Common Issues