Honeywell Valve problem

[StuartDavis]

Hi
Have already posted this on the Central Heating forum, but if anyone can offer some advice, it would be much appreciated.
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Hello everyone.
Hoping someone can help.
Brief summary of problem :
Baxi boiler OK, plumbing OK, pipes OK, but in my airing cupboard there is the CH/HW timer control connected to a normal plug socket. This is connected to the Honeywell 3-way diverter valve plumbed in to all the various 22mm pipes leading to the HW cylinder (I think ?) and elsewhere.

Sometime tonight after the CH & HW clicked on from the set timer, the Honeywell valve seemed to short out and went bang, causing the fuse in the plug socket to blow out aswell.

I have changed fuses (tried about 6 in all), and each time the plug socket is switched on, the Honeywell valve box seems to fuse and "pop" first rather than the plug fuse.
Question is : do you think I need a whole new Honeywell valve box ?
I note you can buy either a replacement powerhead, and also a replacement synchron motor.
I am reasonably competent at diy although not an expert.
Are they easy to replace, as I would rather not get involved with draining down the whole system, when replacing a component may be an option.

Can anyone help with any advice on this topic ?
Thanks in advance.

 

[Bernie2]

What amperage is the plug top fuse? It may be greater than the valves internal wiring and could make it catch fire. So for safety sake I would check the right size plug top fuse is fitted.

Anyway, it depends what has blown, if the valve has had a constant over charge the chances are its going to be a bit burnt out electrically and so a new actuator head would be required.

But then before you buy one, check the valve is motoring over to all its positions correctly by moving the mechanical lever. If its tight, it may mean the internal part of the valve is also seized up, in which case its either a case of renewing the whole valve or overhauling the valve with a repair kit, both of which mean a drain down.

Also check if its a diverter valve or a mid position valve.

Price wise, real Honeywell stuff is dear, you can get some actuators such as Horstmann's that are cheaper and may fit the valve.

Check the numbers on the motor house cover.

And yes you can get replacement synchron motors.

Pleas observe all electrical safety when working on these valves.

 

[Rox]

[FONT=&quot]Hi Stuart,
Honeywell has a technical helpline during office hours: 08457 678999.
While you’ve had problems with your valve, all those I've spoken to say their valves are the most reliable - reflected in them being market leader by far despite their higher price.
Good luck![/FONT]

 

[Bernie2]

I would agree, Honeywell is probably the best and would go for them if you can afford them. But if you can't there are alternatives.