Grant Vortex 26e oil boiler always warming water.

MarkyMark7890

New Member
I have a 2013 Grant Vortex oil boiler that is always on. This is despite the remote controller turned off, as well as the heating and hot water switches on the boiler turned off.

The following Leds are always on:
Power
DHW Pump
Flow
Demand

Thoughts?
 
The hw demand circuit seems to be energised. I’d start investigating how the timer is connected. Whether someone has fiddled with the hw switch, or the switch is faulty. Failing that seems like a pcb fault
 
Thanks for replying Jonathan.

A check with a multimeter identified the flow switch as stuck closed (0.4 Ohms).
A quick tap with a screwdriver handle freed it and the fault disappeared.
I’ll order in a switch as it’s likely to be on its way out.
 
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