Oil burner on but no hot water or heating

turip · 3 May 2015

Hi there,

I have a Grant 15-21 oil boiler which we had installed March 2012. I have had it serviced regularly (i.e. yearly).

Today I ran out of hot water in the shower which was slightly odd. I went downstairs and turned on the boiler, both hot water and heating and thought nothing of it. An hour or so later I realised I still had no hot water and the radiators remain cold. The boiler is in use every day normally.

I have oil in the tank according to the watchman but I am about to go out and do a dip test.

Could there be air or sludge etc in the line? Is there anything I can try.
Cheers
Rossco

turip · 3 May 2015

Definitely oil in the tank, its about 1/3 full. hmmmm.

Terrywookfit · 3 May 2015

Which of the lights on facia are lit?

turip · 3 May 2015

None that I can see, the only light visible is on the on/off button. It only illuminates once turned on. The boiler is currently off, although I am looking to see if I can find the bleed valve.

Terrywookfit · 3 May 2015

Which model boiler is it

turip · 3 May 2015

Its a Grant Vortex Eco Utility 15-21

Terrywookfit · 3 May 2015

Have you checked the burner lockout reset and limit reset.

turip · 3 May 2015

I did press the lock-out button when it was switched off but not the overheat thermostat reset button on the top panel. I will go an do both now. Is it simply a case of depressing when the boiler is off?

Terrywookfit · 3 May 2015

Unscrew the black cover and press the small spindle in.
Do it with boiler on.

turip · 3 May 2015

Tried it but no luck. Boiler still fires up and runs but no heat. I also tried bleeding the system. Oil comes through, no real evidence of bubbles, but again no heat. Any other ideas?

Terrywookfit · 3 May 2015

Could be photo cell..... solenoid..... or motor.

xr4x4 · 3 May 2015

So the boilers firing and the pipes get hot?

What about in the airing cupboard.

turip · 3 May 2015

The boiler is on i.e. its noisey, but there is no heat. If I feel around the unit itself there is some residual heat but not much. Pipes and hot water tank stone cold.

leakydave · 3 May 2015

What is the system pressure?

Burnerman · 3 May 2015

So, the burner is starting and running but then shutting down shortly after, is that it?
The flue pipe is getting hot?
John

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Oil burner on but no hot water or heating

Similar threads