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Was the heating system properly flushed when first installed??? Yes - I would expect Morris Homes contractors to have done this. At any rate, it was done under MH's warranty twice in the first 2 years. I'd expect more than 5 years!! Me too If you have had to replace that many valves over...

I am on my 4th CMV322 in 5 years! - This one is playing up after 19 months - to me that is not long enough - I'd expect 5 years, is that unreasonable? Looking at the posts that you have all very kindly posted, the Honeywell does seem the preferred option, on a like for like. I would prefer to...

Ahh - well that sort of answers my question - as I'm not into re-wiring the programmer myself. Looks as if the simplest is to try a Honeywell then... Any idea which model Honeywell will replace the Siemens CMV322 & DVA3? (I have photos, but can't post link yet) Thanks Dave EDIT to...

Thanks for the welcome! Dave

OK - I know it will be a drain down job anyway, so I could change the existing siemens for 2 x 2 port valves while I am at it...  However, I do have a few questions regarding replacing a 3 port with 2 x 2's: 1, As the system was "designed" with a 3 port valve, will changing 1 x 3 port valve to...

OK thanks for the answers, it seems I do need to do a bit or work. Can I replace a Siemens with a Honeywell? Is this better than replacing a 3 port with 2 x 2 ports? (Less work obviously) I  have watched the video too which slightly answers my question about replacing a Siemens with a...

Hi, My 5 year old house (built by a major company) has a "conventional" hot water/heating system: Gas Boiler (Potterton?) Siemens programmer Pre insulated Hot water Tank (in airing cupboard) Siemens DVA3 actuator Siemens 22mm 3 port Valve. Inhibitor in system. The problems I have had...

Hi, I have joined this forum to try and rectify a problem I am having with my domestic hot water/heating. Thanks Dave1510