Honeywell Programmable Thermostat Heater "st6400c programmer" Questions

I need a user manual for Honeywell ST6400c programmer manual for Honeywell ST6400c programmer Google Search .try this

st6400c Honeywell programmer blank. Mains turned of whole day. Now back on, but st6400c blank. Have you tried pressing the 'Reset' button (with the tip of a pencil)? After doing this, you will have to

Honeywell ST6400C - hot water not working I have a Honeywell ST6400C and while the heating works perfectly normally (firing up the boiler on command etc) the hot water light refuses to come on & ...

st6400c thermostat wont run the central heating independantly our honeywell st6400c thermostat worked fine when installed but now will not run the central heating system on its own - the hot water ...

ST6400C programmer The boiler does not fire when hot water is selected although the red light is on. However, the boiler fires OK when central heating is switched on and this does then heat the water.

ST6400C programmer, heating switched off. Switch hot water on only, tank full of hot water but pump runs and radiators get hot. Wall stat is set at zero. When programmer is touched and the flap ...

No hot water honeywell st6400c I have a honeywell st6400c when HW is switched on I have no HW lights work but cant hear system kicking in and boiler won't start but if I put heating on boiler kicks in

I went to put the heating on and my honeywell ST6400c suddenly went pop and I have nothing tried the reset still a blank screen its nearly 3 years old what can I do checked all the electric in the ...

the timer my missus had,broke down (st6100c) And i've managed to get hold of an st6400c,for next to nothing.Her central heating at the mo has been wired into a fuse spur which she switches on and off ...

...programmer and would like to upgarde to an ST6400c. How difficult will this be, is the wiring common? yep the wires will hook up to the same designations, just write down what color was connected ...