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This may be a "how long is a piece of string" question, but how long should a room about 12' by 13' with solid walls and a bay window take to heat up from 16c to 21c? I know it's been cold recently, but it's taking 4 or 5 hours or so which seems excessive. The radiator, which is a double 160cm x...

I'm about to fit a Honeywell CM927 programmable thermostat to my Worcester 28Cdi. We have 10 radiators (includes 2 large doubles and 4 smaller doubles), all fitted with TRVs except in the bathroom. I know the system is out of balance because the rads heat up at different rates. It's a 3 bedroom...

I'm replacing a Honeywell ST6100C timer with a Honeywell CM927 programmable thermostat to a Worcester 28Cdi. Can someone please advise on the correct wiring, as the wiring diagrams in the installation instructions and on the reciever box seem to conflict on which live terminal to use on the...

Can anyone please tell me if the Honeywell CMT927 and CM927 programmable thermostats are exactly the same item with two part numbers? Or is one number an earlier model and if so which one? Thanks

Having had WB out last week to replace diverter valve, gas valve and w to w heat exchanger on my 28CDi, I've now got the boiler pressure going crazy which looks like an expansion vessel problem. I re-pressurised it a few weeks ago so it's probably gone completely. In fact, it seems to be weeping...

Just had a new heat exhanger and was recommended a Magnaclean as there is sludge in the system. Is the Professional or Twintech model or even another make best? The Twintech looks like a good idea as it's supposed to remove magnetic and non-magnetic particles. Is it essential to flush the system...

I have a Worcester 28Cdi combi. I've just replaced the automatic air vent but when I fill the system water spurts out of the AAV before the pressure gauge shows any pressure. What have I done wrong?

I have a Cannon Chesterfied gas cooker (model C60GCK). We have not used the top oven for some time because although it lights on ignition it will not stay alight no matter how long you hold the knob pushed in. Now we have the same problem with the grill, which is even more annoying. Has this...

I have recently got my boiler working again after resolving pressure problems caused by a slow leak (PRV I think) and a flat expansion vessel. It has worked fine for a few days (although the boiler pressure rises from 1.5 bar cold to just under 2.5 bar when hot which I think might be too much...