I have had an intermittent problem on a Potterton Profile F for 2 days. The fan comes on, then the pilot ignites but the main burners don't come on. The pump is running OK. The problem started a few days ago but now the main burners don't come on at all. Checked the PCB and all seem OK. No dry joints.
Any ideas?

John C., March 2012

Change PCB nothing to do with dry joint,one of component is faulty

ltd, March 2012