Room sealed chamber panel removal Alpha CB28x

[mananin]

Hi

I need some guidance for an Alpha CB28x.

I need to remove the room sealed chamber front panel to replace the Primary Temp Sensor but is won't budge.

The current sensor has a cold resistance of 48Kohm and a hot resistance of 120Kohm. The Alpha manual for this boiler indicates that cold it should be 12-14K and hot approx 3K, the replacement part (1.015970) I have has the values indicated by Alpha.

Other symptoms;
LED (Neon) B blinks every 5 seconds (manual says temp sensor fault)
The fan spins up and is ok
The pump spins up and is ok
Overheat thermostat has continuity

I have access to the panel and have removed the 4 screws that are in each corner and the big one in the center but the panel won't budge. I've inspected the edges of the panel where I can and can see no other fixings that might hold it in place. Before I use any force to attempt to remove it I though I'd ask on here for any advise.

Thanks for any help you maybe able to give..

 

[McCombi]

Join the private room 'combustion chamber' by emailing admin your gas safe register number and we'll be able to help you.

If you aren't a competent rgi then you Wont find any help on this matter as it can lead to leaving very unsafe situations.

 

[mananin]

Join the private room 'combustion chamber' by emailing admin your gas safe register number and we'll be able to help you.

If you aren't a competent rgi then you Wont find any help on this matter as it can lead to leaving very unsafe situations.

Thanks for the advise, if its at this stage I have to get a Gas Safe engineer involved I will do.

Thanks again.

 

[Agile]

Yes you need an RGI to open the combustion chamber and test the boiler after refitting it.

Tony