Heating downstairs only works if upstairs is called.

[ericmark]

because building regs say you have to in England and Wales

It says you must have zones, but nothing about how the zones are formed, TRV according to a number of council websites are considered as forming zones.

 

[ianmcd]

It says you must have zones, but nothing about how the zones are formed, TRV according to a number of council websites are considered as forming zones.

Only if smart TRVs each zone must have a boiler lock, standard TRVs do not

 

[mfizz]

Thanks all. It was the microswitch at fault.

 

[ianmcd]

Thanks all. It was the microswitch at fault.

what did you do in the end ? change the actuator head or just the micro-switch ?

 

[mfizz]

what did you do in the end ? change the actuator head or just the micro-switch ?

I replaced just the microswitch. I plugged the L/N of the motor into a test block and the motor was working fine turned into fully open position, which further pointed to the switch. After opening, pressing and depressing the switch wasn't completing the circuit.

 

[rich19754]

Hi all - sorry to resurrect such an old thread but I have exactly the same issue as the original post. Basically it’s a 2 zone system with upstairs separate to downstairs and 2 thermostats (one upstairs and one downstairs). When i turn the downstairs thermostat on it clicks and opens the motorised valve but then no demand is requested from the boiler and the heating doesn’t come on. When I then go upstairs and turn the upstairs thermostat on the upstairs rads come on as usual but now the downstairs also works. So far I have replaced the downstairs thermostat (existing was Honeywell DT1) with a Honeywell DT2 and I have replaced the full motorised head with a replacement 2 port Honeywell head but the problem still persists. Any ideas really appreciated as I was thinking of replacing the upstairs head as well but I am not really sure why

Thanks in advance

 

[terryplumb]

You should really start your own thread to get more response.