Hi,

I woke up this morning to a cold house. My Potterton Netaheat Profile boiler had no pilot light. I managed to ignite it but it only stayed on for about 15 seconds then went out again. The fan came on during this time too.

It now automatically repeats a firing up the pilot light process every 10 minutes or so. As before, the light pilot stays lit for about 15 seconds then goes out again, the process retarts automatically 10 minutes later....any ideas anyone?

Thanks for any help...

Michael, January 2010

If you have a fan that starts up before the boiler ignites , then there is also an AIR PRESSURE switch.

The problem may be due to a partially blocked plastic pipe between the switch & fan.

It goes via an inline metal restrictor ( inside the plastic tube) that can block up.

Remove the tube and suck/blow so that you can hear the Air Pressure Switch clicking...then replace the tube.

A very common Netaheat fault....on the boilers with the fan + pressure switch !

Beware scrapping the boiler as most parts are still available (Ebay etc) so don`t jump to any expensive conclusions.
(and don`t believe what the CH engineers or Gas Board tell you. These old boilers are built to last....more than 28 years if necessary!)

chas, January 2010