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Andrew Smith
Andrew Smith, Home Appliance Technician
Category: Appliance
Satisfied Customers: 3768
Experience:  Gas cooker specialist
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Vaillant ECOTEC plus boiler. loses pressure need water top

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Vaillant ECOTEC plus boiler. loses pressure need water top up before it will start up
***** ***** : How long does it take to lose the pressure?
JACUSTOMER-wij1ggb6- :

It appears to maintain pressure when the heating is on loses it when the boiler switches off by the timer e g overnight

***** ***** : Ok try putting a sandwich bag over the PRV discharge outside (about 3ft below the flue) and see if you losing the water that way?
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