hi all wondering if anyone could give me some advice please,,my C/H will only fire up when the Honeywell Sundial y plan 3 position diverter valve is switched to the manual position, Pilot light is on all the time , the system is a baxi very old be grateful for any help ,thankyou
Honeywell Sundial y plan 3 position diverter valve
- Thread starter mrhaveago
- Start date
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New 3 port valve needed. The one you have is stuffed.
Or maybe just the synchron motor.
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Thanks,would it be safe to keep the valve in manual position all the time as the boiler will still fire up.....?
Thanks guys much appreciated..
so good news the Honeywell Sundial y plan 3 position diverter valve is now working in the auto position and manual,the old baxi boiler is firing hurrah...unfortunatly the radiators are now not heating up,i have tried bleeding them but they were ok...weird...any ideas anyone????please.
Still sounds like the valve! It may be open to Hot Water port, and allowing boiler and pump to run, but is not allowing any flow to heating. Maybe possible to repair or a new valve is about £54.
M
mysteryman
Sounds as if the boiler has just responded to a DHW call, but the Synchron motor is shot.
Is this a 3port mid position valve or a diverter valve?
if you are getting any Ch, then the valve must move to mid position so the motor can't be shot.
I suspect that when HW becomes satisfied when in mid position the valve does not move on to CH only as it should, or if it does move on the boiler does not light.
The above can be due to a few things
(a) a stiff spindle
(b) fault with micro switch No 1 so motor can't continue beyond mid position
(c) fault with micro switch No2 so even though motor moves to CH position there is no power from 'orange' wire to light boiler.
A replacement actuator head will cure (b) and (c) and include a new motor.
if you are getting any Ch, then the valve must move to mid position so the motor can't be shot.
I suspect that when HW becomes satisfied when in mid position the valve does not move on to CH only as it should, or if it does move on the boiler does not light.
The above can be due to a few things
(a) a stiff spindle
(b) fault with micro switch No 1 so motor can't continue beyond mid position
(c) fault with micro switch No2 so even though motor moves to CH position there is no power from 'orange' wire to light boiler.
A replacement actuator head will cure (b) and (c) and include a new motor.
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