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Thanks guys for the very useful info. I have already ordered a complete valve but in future I shall know how to get the control wheel only which is a massive saving. Interestingly we have been using the 'turn the hot flow rate down' method or leaving a cold tap on elsewhere to get an improved...

Hi I have been working on a vaillant 282 and have replaced the dhw heat exchanger. This has improved the hot water temperature but I still think the water section needs replacing as the temperature setting wheel does not adjust water temperature. I replaced this part about 2 years ago...

Hi guys Got the new diverter valve from our friends in Wembley this morning and they exchanged the old one without any quibble. I checked before leaving that the spring and check valve were new. Put it all together and eureka ! we had ignition and the one to be obeyed has been suitably...

Okay I have got to the bottom of it I think I took out the recently replaced diverter valve and found that part of the valve had broken internaly. This was a supposedly reconditioned part but obiviously had not had its insides replaced. The valve seat that had broken up is the one that...

Hi Tony I agree I dont think the pump will fix the problem but it is old and I will replace it as the original is becoming noisy. I have looked at the pipe work and the CH return pipe connects to the system bypass pipe (painted black) in a junction before entering the diverter valve. This...

Oh I forgot to ask How do you carry out a pump finger test ? :wink:

Hi Tony you were up late !! The 'primary heating water stabilises at 70 degC' is a reference to the temperature that is shown on the front temperature dial when continuosly drawing hot water, I may not have used the correct term but I meant the system water temperature. I carried out a...

Thanks for the info Tony I only had a 200 ohm resistor to hand and that cut out the burner when tried. I will replace the NTC anyway as it is so old. I think I need to start again as the symptoms are not so clear. 1. The DHW works okay , the boiler keeps heating the water and does not shut...

Thanks Tony Good advice .... I have measured the cold NTC resistance at 2.3K ohms and it does appear to reduce as it is heated. The troubleshooting chart suggests that if the boiler shuts down when this is grounded then it is NOT the Thermostat PCB . The boiler does shut off when this is...

Hi Guys I have a Vaillant 282eh boiler about 15 years old . It has over its lifetime had a new DHW exchanger,Main heat exchanger, DHW control valve, and just recently a new Diverter valve. It gets alot of use and I have been reasonably pleased with its performance. I have a problem of the...