Honeywell 4073A Motorised valve

octopusac · 15 Sep 2012

I seem to be getting both CH and HW whatever programme is called for. ie CH on gives hot water and HW gives CH as well.

The valve sounds as if it is operating.

Any advise

Thabnks

Barry

doitall · 15 Sep 2012

Probably the microswitch or valve is stuck.

diynot

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Honeywell 4073A Motorised valve

octopusac

doitall

DIYnot Local

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