Why does my boiler come on for no reason?

It could be a component, such as the heat exchanger or an internal thermostat, in which case you should not attempt to fix it – call a gas engineer who will be able to assess the situation and recommend a repair or replacement. Making sure your boiler has its annual service should prevent this stop-start pattern.

Why won’t my grant boiler fire up?

Your oil boiler won’t fire up for central heating or hot water, if the fan isn’t operational. The fan works with the flue to push the gases from the condensing process out of your property. If there’s a fault with the fan, your oil boiler won’t fire up – it’s as simple as that.

How do you reset a grant boiler?

Can be manually reset once the boiler has cooled down. Unscrew the plastic cap and press the reset button (see right). If the boiler overheats regularly there may be a fault and you should contact your installer. Ensure that the pointer on the gauge is reading between 0.5 and 1.0 bar when the system is cold.

How do I reset a vortex boiler grant?

To restart, set the switch to ON. For long periods – Set the boiler switch to OFF. If required, the fuel supply valve may be closed and the water and electricity supplies turned off at the mains.

Why does my grant boiler keep losing pressure?

Your combi boiler can be losing pressure for a number of reasons. Pressure loss may be caused from a leak in the pressure relief valve, an issue in the expansion vessel, air in your system, or a leak in the heating pipework itself.

How to tell if a grant boiler has a fault?

Grant Boiler Error Description 1 Fault with burner 2 No fuel supply 3 Oil tank empty 4 Fire valve closed 5 Fire valve closed. 6 Fuel line filter is blocked 7 Oil supply line is air locked 8 Excessive combustion air 9 Fault with burner

How to troubleshoot grant vortex oil fired boilers?

Table A – boiler start and burner related fault finding table for all Grant Vortex oil fired boilers Refill system to 0.5 – 1.0 bar. Check for 230 V at boiler terminal block. Set boiler thermostat to maximum. Check for 230 V output from BURNER LIVE terminal of PCB. fault with burner. Press reset button – no more than twice.

When did the grant 50 / 90 kerosene boiler come out?

Hello I have a Grant 50/90 Kerosene Boiler with a Minor 1 Burner that I have had in the house since 1996. Had a few issues with it like most boiler/bunrners but 9 times out of ten I have been able to fix them myself.

What should the water temp be in a grant boiler?

Not all Grant oil fired boilers are suitable for use with a sealed system, check if that is the option on your user manual. The maximum temperature of the central heating water is 85°C for the Combi V3 and Combi Max and 80°C for the Vortex Combi models.

Why does my grant boiler not come on?

My grant boiler is suffering the same problem. Just coming up to 2 years old. and the heating or hot water wont come on when programmed. I have the Grant RF programmer, it indicates that it is transmitting the signal and you can see the red LED on the receiver light up.

Why does my grant 90 have no hot water?

I have a grant Oil fired Combi and currently have no hot water – or shuld I say I momentarily have warmish water for about 10-15 seconds then it goes cold again. I suspect the blending valve may have failed but as it was replaced only 2 years ago wondered what is the normal life expectancy of these valves?