Recent content by IggyT

The engineer has removed the old Vaillant thermostat receiver from the front of the boiler, which seems to have fixed it. I'm sure I tried that myself and didn't see the boiler go over 50, but maybe I wasn't patient enough. The rads are nice and hot now and I've got over 18 degrees in the house...

another engineer is due today. Looking at the last report, the pcb was changed and it made no difference, so the engineer took it back out again.

The hive has live-live, neutral-neutral and the control wire to the 230v RT. All on the right hand side of the pcb.

I’ve been experimenting with the Vaillant thermostat and it only makes the boiler go over 50, if I set the temperature to 24 or above (which is the same temp as the hive gives when you press the boost button, except nothing happens with the hive). Otherwise it just heats at 50. I was always told...

I disconnected the hive unit from the boiler. Put the jumper back in on the 24v RT and put batteries in my old Vaillant wireless controller and bingo, the boiler is now firing nice and strong and reading 68 degrees on the front panel. So, is there something else you need to do on the hive wiring?

The boiler keeps firing lightly at 50 until the thermostat temp is reached, which is never, because the thermostat is at 20 and the house is not getting past 17.8 due to the rads not getting hot enough.

I've got trv's on all rads bar one. I will start taking them off. One thing I have noticed, is a few rads seem to have the flow around the wrong way, e.g., the pipe with the lock shield on the left hand side of the rad is warming up first. So, in effect, my lock shield is my trv, which is confusing.

My HW is fine, nice and hot and steady. The CH is fine, but the boiler is only heating to 49/50 degrees, which makes the rads only slightly warm. I have had 3 heating engineers round from British Gas. New main pcb. New pump. Each time they have left and said to my Wife, “it’s fixed”. When I come...

Thanks for the advise. I will take the programmer cover off and see what it is controlling.

Thanks for the reply. It’s not a Combi, i.e. I need hot water in the cylinder tank for showers etc. So the programmer and all the other bits are in the airing cubboard. I guess this is were the heating and hot water are controlled from. Some more investigation needed I think.

I’m looking to add a Nest stat and have been looking at how the current system is wired. I have a Honeywell stat that sends to the boiler. The boiler is in the garage and the programmer and tank are in the bathroom above the garage. The junction box by the boiler has mains power, going to the...

The outside temp is approx 10 degrees, but the house is a little cold at 16 degrees, so I thought I'd put the heating on for a bit, but the boiler is only show 38 degrees and the only way I can get the rads to get hot is to put it in chimney sweep mode. The boiler is coming up to a year old and...