How long do honeywell two port motorised valves last?

[Ed_R]

Ours are lasting between a year and two years and then I have to replace. Is this normal or should I be investigating our central heating system to find out why?

Which motorised valves do you recommend I use?

 

[Deleted member 120897]

Honeywell seem to be hit and miss currently. Is it the motor that’s burning out? You may have sludge.

 

[ShaunCorbs]

No not normal auto bypass or not one installed ?

 

[Scott_D]

Where are you buying them?

 

[EvilDrPorkChop]

They're really dodgy at the minute tbh, i'm hardly having them last. Anywhere between 2 and 5 years and they're going pop.

Started using Drayton instead where I can.

 

[Ed_R]

They're really dodgy at the minute tbh, i'm hardly having them last. Anywhere between 2 and 5 years and they're going pop.

Started using Drayton instead where I can.

Thanks. The system is free of sludge - I had all that done. The latest one the cogs were slipping, so the motor was fine.

I believe we do have an auto bypass - but this particular problem (resulting in changing the valve) started with the pressure going to zero. I repressurised the system and was left with an intermittent problem with the valve. I do hear kettling from time to time and I would like to understand Shaun's question better.

Another thought that I have is that I use the honeywell evosystem (which I like a lot). I wondered whether valves get more use and therefore deteriorate faster as the valve turns on and off as successive rooms demand heat.

 

[Ed_R]

I have read up and the auto bypass valve should be between the pump and the valve - it isnt. So is it worth getting that done?

 

[Deleted member 120897]

I have read up and the auto bypass valve should be between the pump and the valve - it isnt. So is it worth getting that done?

Possibly, but post a photo of setup, then we may be able to point out some other stuff 👍🏻

 

[ShaunCorbs]

Yes especially if you have pump overrun as the pump will be pushing against the valve and wearing the gears more / forcing it open

 

[Ed_R]

 

[Deleted member 120897]

That left hand valve looks cockeyed, but seems like Shaun’s suggestion is the solution.

 

[Ed_R]

Yes agreed. Many thanks all.