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:D Replaced the DHW flow switch with a new one. Tested boiler, all ok up until now. Thanks for all your help, much appreciated. All the best Mark

:D Replaced the DHW flow switch with a new one. Tested boiler, and up until now, all is working fine. Thankyou for your time and help in resolving this matter. Thanks, and all the best Mark

Hi Again This morning i isolated the boiler ( Water and Mains ) then removed the DHW flow switch. On inspection the tip was Black, so decided to clean it with a bit of wire wool. I then replaced the switch and tested the boiler. All was ok , ran DHW tap and had instant hot water. Turned off...

Hello, and thanks for your earlier response. Is there any way i can test the microswitch, or is it just a case of replacing it to see if that works. All the best Mark

Hello Tony Thanks for your response. This Temprature sensor switch should activate the boiler if DHW is called for i take it . Is there anyway i can check the operation of the switch, or do i just replace it ? . Ive priced one up £10 - £15 . Any response would be welcome. Cheers Mark

I had a Baxi 105e Instant installed three years ago, and up until now has caused me no problems. The problem i am currently experiencing is with the DHW. Sometimes when the DHW is called for, it supplies Hot water immediatly and yet in another instant it will run cold and the DHW will not...