Hot water problem with Ravenheat combi

[dazza182]

I would very much appreciate any advice regarding a problem with my Ravenheat 85CSI combi. The boiler will not heat water unless the central heating room stat is requesting heat even when the boiler is switched to hot water only. Any suggestions

 

[LUNAT]

HI


microswitch moving?

 

[dazza182]

The microswitch is working ok and boiler fires water starts to heat then boiler cuts out it goes on doing this unless the room stat is turned up? even when switched to hot water only.

 

[dazza182]

Problem still exists and any help would be much appreciated. especially with warmer weather and not requiring heating on now.

 

[SortedPlumbing]

Is ur burner shutting down intermitantly when you are running HW?
Or does burner stay on ?

Possible cause is CH sensor
(more than likely if older model with WET sensor)

 

[dazza182]

Burner keeps cutting out then firing up again and as it starts getting hot it cuts out again. The puzzling thing is why doesn't it do it when the central heating is on the hot water works fine.[/quote]

 

[LUNAT]

HI

change hw sensor first if problem persists then diverter valve might be culprit.

 

[SortedPlumbing]

CH sensor!!!

 

[dazza182]

Hot water and central heating sensors changed all now working fine thanks for the help.