Just had oil burner cleaned. Shuts off after starting

Don_175

We just had our Beckett AFG oil burner cleaned and filter changed as well as pump gasket. I happened to be home and heard oil burner come on. It did a prime or whatever it does. Then I heard the flame. It ran for about 5-10 seconds then shut off. After about 30 seconds of being off, it came back on and is running fine. Anything I should look for? I assume I need to call out service person? Thanks 

Jamie Hall

Probably a problem with the flame sensor -- cad. cell. And something for the service person. However, that said... that particular problem can be a bear to find, never mind fix. Been there, done that.

HVACNUT

It sounds like it went into "recycle", which is a try after losing the flame signal.
What primary control?
I would call tech back. It's not typical. 

Don_175

Control says Genisys 7505. Seems odd, maybe a coincidence, but it seems like I hear a humming sound in our kitchen with boiler on that I don’t remember. 

EBEBRATT-Ed

@Don_175

It possible it is normal and there is nothing wrong.

It could have cycled momentarily on low water (if it is steam) or it could have shut off on boiler temp with the thermostat calling. Then when it restarted it ran a little and the thermostat was satisfied.

But you know your system and its usual noises.

I would call your service company and make them aware. Then maybe run it a few days and see what happens to avoid an unnecessary call.

Don_175

EBEBRATT-Ed said:

@Don_175

It possible it is normal and there is nothing wrong.

It could have cycled momentarily on low water (if it is steam) or it could have shut off on boiler temp with the thermostat calling. Then when it restarted it ran a little and the thermostat was satisfied.

But you know your system and its usual noises.

I would call your service company and make them aware. Then maybe run it a few days and see what happens to avoid an unnecessary call.

Water is at correct level as based on the line on boiler jacket, and boiler had not run in a few hours so definitely had not cycled on pressure or set temp. Yesterday afternoon, it recycled 10-15 seconds after starting. Then, last night, I heard it come on. The burner ran for at about a minute and then recycled but then ran fine for the rest of the heating call. So it seems to recycle at different points but so far then runs til completion.

HVACNUT

Where is the oil tank?
1 pipe or 2 pipe?

neilc

what type(name) thermostat ? (Nest?)
and what type LWCO ?
I'm wondering if thermostat is resetting LWCO(psychogard) and it's testing out , , ,
I read the thread again, sometimes I get way off base,

Don_175

HVACNUT said:

Where is the oil tank?
1 pipe or 2 pipe?

Oil tank is in basement about 25 feet away. There is only 1 pipe leading from tank up to ceiling and then to oil burner. One other thing I notice is a high pitched whining sound (hard to explain..not a whistle, but a high pitched sound) on first floor. Not so noticeable in basement but it sounds like it may be coming from the oil pump on burner. It says Cleancut. I tapped it with my hand,and the whining sound changed.

HVACNUT

Air.

EBEBRATT-Ed

Could be air. Could be the oil line is strapped down against something that amplifies the pump noise. I have herd this before with overhead lines.

Don_175

EBEBRATT-Ed said:

Could be air. Could be the oil line is strapped down against something that amplifies the pump noise. I have herd this before with overhead lines.

I will check all fittings for tightness. The pipe is strapped to ceiling joists but has been for a few years. And the sound definitely started last winter. I didn't really notice where it was coming from until I started investigating the recycling. It didn't recycle the other night and now it's warm. Service guy wants me to keep an eye on it for the next week or so to see if it keeps recycling. When it does occur, it only does it once per heating cycle (at the beginning of the call for heat).