Heatslave 20/25 surge

[richard3009]

My Worcester 20/25 is producing an intermittent surging noise, I reckon it's a similar noise to when I have had air in the fuel line after fitting new fuel hose. Could this be fuel starvation noise from clogged fuel filter. I'm told the fuel filter at the tank has not been changed since install 7 years. Blower motor is brand new and so is fuel pump.

 

[SimonG]

Who fit the fuel pump?

 

[SJB060685]

If you had a blocked strainer at tank or inline filter or pipe etc you would not have ignition. Using a vacuum gauge you can see if theres any restrictions before fiddling with pipe work but I assume you don't have one and from what you said I'm assuming the burner ignites and doesn't go to lockout.

 

[richard3009]

Burner is not locking out, just intermittent buzzing/vibrations that come in waves around 20 secs apart, new parts fitted by oil tech

 

[SJB060685]

Burner is not locking out, just intermittent buzzing/vibrations that come in waves around 20 secs apart, new parts fitted by oil tech

Is the oil line gravity or under suction (tigerloop)? Where is this noise you hear located?

 

[richard3009]

No tiger loop on system pure gravity and head, hard to pinpoint the noise location

 

[SJB060685]

Hmmm . Without hearing it or pinpointing the rough area it's hard to say

 

[SimonG]

Something not tightened up when new parts were fitted.

 

[SJB060685]

A possibility SimonG yes. Possibly the grub screws holding pump in place. Was the pump coupling changed at time of pump and motor?

 

[richard3009]

Noise is from the oil pump just listened with ear to screwdriver, all is tight checked, not sure how old burner nozzle is could a clogged nozzle cause it