Oil Boiler Tripping every 24 / 48 hours

[AJPotter]

I have a Boulter Camray 5 oil fired combi boiler. Every 48 hours or so it trips then restarts first time every time the trip is re-set.

My heating engineer initially suggested this was caused by a faulty central heating pump, then suggested it may be the solenoid, both have been replaced. The oil tank is full and everything has been serviced in the last 2 months.

Growing tired of removing the cover to re-set I left it off, it then ran for 2 weeks without tripping. Yesterday I replaced the cover and within 24 hours it has tripped again. Suggests to me that something must be getting too hot (or that something doesn't like the dark, but as it is pitch black at night that seems unlikely).

The engineer said if the solenoid doesn't fix it, the problem might be a faulty control box.

Any suggestions?

 

[slapper]

Fit a new capacitor to the motor on the Burner, this could help

 

[AJPotter]

Is that because a faulty capacitor would fail when it gets hot? so prevent the burner motor from starting? or is it to smooth the voltage into the motor on the burner?

 

[oilhead]

How old is the Camray? What burner is fitted? Does it have an air duct to the burner for combustion air or is it 'case sealed' balance flue?

 

[Boilerman2]

+1 on the Capacitor your boiler is showing "Classic symptoms"

 

[AJPotter]

How old is the Camray? What burner is fitted? Does it have an air duct to the burner for combustion air or is it 'case sealed' balance flue?

About 10 years old, think it has a vertical balanced flue.

 

[oilhead]

!0 years old makes it a case sealed balanced flue. Check for leaks round the baffle access cover any flue joints, and the burner mounting flange gasket. Leaving the front off gives the burner access to fresh air. Replacing the front means the burner is taking its air from within the enclosed ( contaminated ) case.
Your service technician should easily pick up any spillage with his combustion analyser probe around suspect parts.

 

[AJPotter]

!0 years old makes it a case sealed balanced flue. Check for leaks round the baffle access cover any flue joints, and the burner mounting flange gasket. Leaving the front off gives the burner access to fresh air. Replacing the front means the burner is taking its air from within the enclosed ( contaminated ) case.
Your service technician should easily pick up any spillage with his combustion analyser probe around suspect parts.

Will ask him to check this thanks. Since last lock out I removed cover but refitted one of two cupboard doors, so no lack of air, tripped again, doesn't trip if no doors or cover fitted. Cupboard has 2ft x 1ft hole at base, so plenty of air flow, it is very strange.

 

[oilhead]

Spillage from the boiler, if it is not into free air will impair combustion. If it cannot escape, which it will from a completely open front, then the burner will suck it in before it has chance to collect fresh air from a hole further away. Case sealed boilers are notorious for this fault. Before Camrays, the problem manifested itself with Myson boilers. Later boilers use air ducts which take air direct from the air intake, and as long as there is integrity in the flue joints, there is no problem, but sometimes, as in Triancos, there is spillage from the flue to the air duct.