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Tim Cooke
Tim Cooke,
Category: Appliance
Satisfied Customers: 1161
Experience:  Owner at Self-employed
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I have a train on contract oil boiler. it is about 10 years

Customer Question

I have a train on contract oil boiler.
JA: Are you getting any error codes or blinking lights on your boiler? How old is it?
Customer: it is about 10 years old.and has recently started to lockout. About a week ago it started doing it a lot , a had a look at it and cleaned the photocell.it didn’t lockout again until yesterday and now it is doing it regularly again
JA: How long has this been going on with your boiler? What have you tried so far?
Customer: A couple of weeks , I cleaned the photocell
JA: Anything else we should know to help you best?
Customer: once it has been reset it generally works fine until the next time it comes on the timeclock
Submitted: 6 months ago.
Category: Appliance
Customer: replied 6 months ago.
Trianco oil boiler
Expert:  Tim Cooke replied 6 months ago.

How recently did you have an oil delivery?

Also, have you checked the condition of the external in-line filter?

Customer: replied 6 months ago.
Had an oil delivery about a month ago, filter hasn’t been checked
Expert:  Tim Cooke replied 6 months ago.

How low did the oil get before delivery?

Customer: replied 6 months ago.
It was low but nowhere near empty
Expert:  Tim Cooke replied 6 months ago.

OK. It's still worth checking the filter in case the delivery churned up some gunge that then entered the oil line. If that's clear and/or after you clear it the fault still persists, then the next stage would be check the electrode distance and gap.

Could you let me know the exact model of your boiler?

Customer: replied 6 months ago.
Trianco contractor 50/90
Expert:  Tim Cooke replied 6 months ago.

For completeness, here's a further list of possibilities:

Air in oil line or pump;
Ignition transformer or leads faulty;
Electrode insulation faulty;
Pump pressure too low.

Does the burner actually ignite, and then go out, or does it fail to ignite?

Customer: replied 6 months ago.
Boiler is on a timeclock, every time after it has been off for a few hours when it is called for it locks out but after a reset it works fine
Expert:  Tim Cooke replied 6 months ago.
Has anyone serviced it recently, and checked the flue gases?
Customer: replied 6 months ago.
It hasn’t been serviced for about a year
Expert:  Tim Cooke replied 6 months ago.

I notice that you wrote "a had a look at it and cleaned the photocell", but a words seems to be missing from that sentence. Did you clean the photocell yourself?

My questions are leading toward the idea that the photocell could well be dirty again, and if that's the case then the possible cause could be oxygen-starved combustion, which would generate too much soot.