Fault finding Boiler/Actuator/Pump

[PeterHolroyd]

Hi,
I have a British Gas F2 Boiler, which I understand to be a Potterton Profile. In the past 3 months it has stopped working 3 times. By not working I mean it is not firing up and heating either Hot Water or Central Heating.

Each time it goes wrong it conincides with someone moving items in the cupboard in and around the Actuator (Honeywell SM3203, 2 port). As the actuator was not fixed securely the answer seemed simple. Secure it properly so that when it gets banged there is no issue.
Before securing it I checked that the actuator was working and it is. Also it is possible to turn the valve by hand. Not sure if it is meant to turn this easily. Some feedback to tell me it is or isn't would be good.

Having secured it I expected things to come back to life, but nothing. I can hear the actuator turning and the pump humming but the boiler is not firing up.
What checks can I do to determine which part of the system is faulty. Any pointers would be greatly appreciated

Help

 

[seco services]

if the pump running and no boiler then i would forget about the actuator and look at the boiler.
checked the sw/l to the boiler is ok ?

wheres the boiler same cupboard ?

 

[PeterHolroyd]

Thanks for that.
Having posted the comment I worked out that by turning the actuator valve by hand then I have eliminated that.

I don't know what an sw/l is but would love to check if it is ok or not. The boiler does seem totally dead.

Having read some more threads I have checked the reset switch underneath. this has not popped out and therefore pressing it has no effect

The last time this happened a boiler man came out and suspected it was to do with the ventalation outlet being blocked. After about 30 minutes of removing covers etc everything mysteriously came back to life with no action taken

 

[Ronald0]

sw/l is the switched live connection at the boiler from the cylinder and room stats and the motorised valve when activated, ie. the signal for the boiler to fire from the external controls.

 

[dfaz]

Check you have power coming into the boiler (the switched live )if you have power and I suspect you have as you can hear the pump running my next port of call from what you have described would be the air pressure switch sticking ,this would prevent the boiler from firing up but can also come back to life when you remove the cover as you disturb it

 

[PeterHolroyd]

Thanks for feedback. I will check all wires and feedback what happens