turn room stat down & main fuse trip's out - help please

3 Oct 2010
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United Kingdom
ok - Boiler working c/heating & hot water work together - hot water does not work on its own. New honeywell room thermostat fitted & New honeywell is it control box in boiler room + New 3 way valve. All seem's ok untill I turned room stat down - as it reached room temp which I assume would turn boiler/heating off the main heating fuse tripped out. Resett the fuse and now the Heating works but the hot water does not and if I select H/water only on the control the light flickers on/off. NB if I select h/w and c/h both lights are on as they should be although the h/w does not heat up. Can you offer any advice ? sure hope so. cheers j
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Has neutrol wire in stat been connected to heat satisfied terminal, would explain blowing fuse when stat turned down........
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