Faulty 2 port valve

[I am bonkers]

In another thread doitmyself gave me helpful advice on how to check the wiring on my faulty Tower 2 port valve. All feeds seem fine but the valve doesn't fully close and it doesn't always switch the pump and boiler on. Doitmyself suggested taking the actuator off and checking that the valve spindle turns easily.

I've removed the actuator motor (which turns on and off OK via the thermostat) but I can't see a spindle. Do I remove the 3 bolts holding in postion the plate which I can now see, or will it all fall apart?

I suspect that the spindle isn't turning far enough one way to fully close the valve and not far enough the other way to close the microswitch contacts.

Any advice much appreciated.

 

[DarkCrystl]

Take it apart and clean out any fluff or crud on the mechanism and maybe check for any play in the switches.[ I had a 5 series that the windscreen wipers didnt work as they shound.-removed switch, dismantled and found the contacts worn over time-cleaned and bent them slightly to give better contact].
This may work or local plumber may suggest something else.Maybe upgrading valve.Try calling one as there is lot of work e.g correct wiring , water etc

 

[I am bonkers]

Thanks. Tried cleaning out, wd etc and got the spindle moving more freely but not enough for reliable working. Propose to replace with Sunvic MoMo valve. Motor on Motor off looks to be good principle. Sunvic technical tell me completely compatible.

 

[secret squirrel]

To be honest if it were me, I'd just replace the whole unit. I can't stand all the faffing about. Change it and be done with it.........just like women (can't say that really but can't stop myself)

 

[abbeygas]

the amount of time it sounds like your spending on it just change it ????

 

[stevetheplumber]

Thanks. Tried cleaning out, wd etc and got the spindle moving more freely but not enough for reliable working. Propose to replace with Sunvic MoMo valve. Motor on Motor off looks to be good principle. Sunvic technical tell me completely compatible.

replace it like for like momo is diferent wiring

 

[I am bonkers]

replace it like for like momo is diferent wiring

Greatest of respect Steve.. you're the professional.... I'm not. However, I rang Sunvic this morning as I had already decided to replace the valve and momo seemed a good idea. They assured me that their momo valve had the same industry standard wiring arrangement as the Tower except that the earth isn't needed in this case.

p14 of http://www.sunvic.co.uk/Sunvic_Catalogue.pdf backs this up.

Is there anything against momo in principle or reliability factor?