Baxi Genesis 80 - Hot Water OK - No CH?

I had this a number of times - it was the 3-way valve (part number 235838) sticking. I cleaned it and lubricated a few times which worked for a short period but eventually replaced it when it stuck every few days. Since replacing it,about 18 months ago, the fault has not occurred since.

Duncan Clarke
June 2008

it may be the diverter valve.
you could try to tap the pressure switch, they do have a tendancy to stick. if not sure where it's located just look in service manual. sometimes it works.

gary
March 2008