Oil Burner trouble!!!

[Ula NI]

I have a pressurized hot water system (we have constant hot water) which had been dropping pressure slowly, we couldn't find any leak so just kept re-pressurizing it every now and again - we are planning on refurbishing the bathroom so were going to get the plumber to do all (sort out pressure etc) at the one time.

Today, the burner appears to have a leak coming from it - see photos -and there is a smell of burning ( i did hear a bang, and that's why i went to investigate - but that could also have been from the dishwasher!)

I have turned the water temp in the boiler down low so it won't kick the burner on, and the heat is not programmed to come on - waiting on the boiler man coming.

Any suggestions as to what has happened?

Also, (back story - we bought the house a year ago.....lots has gone wrong since - see my other posts!) should i be worried that there seems to be rusty/corroded green drips on the
piping? The first photo shows where the water seems to have spurted onto the wall on the right.

 

[gigz]

Fire valve should be outside, and why's the phial on the floor ?

 

[Ula NI]

Burner engineer came and looked at the burner, nothing gone in it, he put the phial up onto the burner above the motor off the floor.
If the fire valve should be outside, why would it be inside?? - what bit is the fire valve by the way??

 

[oilhead]

the fire valve is the valve at the end of the copper capillary. It should be outside, or if impractical, as close to the oil line entry as possible. The bulb should be over the burner in your installation. I would wait for your engineer to come. The bang could be from within the boiler and may not be too serious.