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potterton netaheat 10-16 wont light?

My boiler makes all the right noises but will not spark, if I remove the outer casing, it sparks but does not ignite, I changed the aps but that made no difference, the fan is working fine.
With the outer casing off, the spark is strong, I jiggled the front unit and the boiler kicked in but the ignition was parmanently on, the flames were trying to go off and on which I presume is due to the ignition remaining on plus the outer cover being off. Would you agree that the pcb board needs changing. The fact that there is no spark when the outer casing is on, but works with the casing off is quite bemusing.

hydraulics only
September 2009

Potterton Heating, Home Heating Systems Potterton Wont Light

10 16 neta heat sparks with pilot but will no go to main flame
any thoughts please

kevin
January 2013

could be air pressure switch

terry
August 2012

My Potterton Netaheat is 21 years old and since having it serviced in Nov. 2010 I have been having problems with ignition when cold.
The fan comes on but switches of after two seconds so the pressure switch does not kick in. After about ten goes there is a click and the boiler ignites.
Why should the fan cut out after two seconds when cold? Everything works OK after boiler warmed up.
The engineer has replaced the pressure switch but the fan cut out is puzzling.
Anyone had the same problem?

Rob Newton
February 2011

The boiler should not light with the cover off as this means that carbon monoxide will be escaping into your room. The air pressure switch should prevent this from happening so there is a fault there but probably more beyond that. Best to get someone who knows what they are doing to look at it.

Rusty Nail
November 2010

does anybody have any potterton netaheat 10-16 boiler parts or boiler for sale

hydraulics only
October 2009

Thx to you both for your advice money is a bit tight at the moment hence the need to try and sort it myself.
I have changed the pcb but the problem still remains, any other advice would be much appreciated

hydraulics only
October 2009

I have copied this from the potterton netaheat 10-16 user manual.

START... time control on boiler thermostat calls for heat.
RELAY contacts close (visual) fan starts (listen).
AIR PRESSURE SWITCH contact closes (listen).
SPARK starts (listen)
SOLENOID opens (listen)
If aps switch operates but no spark check H.T lead and electrode for tracking,cracks,dampness etc.
If ok suspect electrode.

The PCB can be obtained from e-bay as a part exchange item, it is relatively cheap so might be worth buying.
The fact that you have had it working with the cover off leads me to think that you are not suffering with a gas problem, it is electrical, aps, fan, electrode etc make sure your fan is working fast enough.

gas for free
September 2009

The Netaheat is Designed NOT TO WORK WITH TRHE COVER OFF!!!

You should get a RGI to attend to this problem as it is beyond the scope of DIY

www.gassaferegister.co.uk
will assist you to find an Engineer near you

www.elanar.co.uk
September 2009