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Mend Vaillant VUW 242e Boiler Pressure Leak

Vaillant TURBOmax VUW 242e loses pressure?

My Vaillant TURBOmax VUW 242e loses pressure gradually through out the day when the system is filled up with the filling loop. The excess water is forced out the overflow drain outside. Checked no other internal leaks in the house and all the radiators funtion are ok. Any ideas as what is wrong.

Peter Annels
December 2010
VaillantVaillant VUW 242eHeating, Home Heating SystemsBoiler Pressure Leak
It's the pressure relief valve,easy to do your self and costs less than £30 on ebay.part number, Vaillant PRV 190717.Getting one myself .

Terry
December 2010
i purchased one this makke of boiler had nothing but problems with it cost me a fortune in repair bills

warren
December 2010
Expansion vessel needs recharging/replacing

Carefree
December 2010

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Vaillant VUW 242e Losing Pressure - Help!