[Ian butcher]

G,plugs work for 2 seconds the go off
I've tested all 4 out if van aok relay off and tested aok
Temp sensor working aok
They only briefly work even in recent cold snap for 2 seconds
I fitted g,plugs in Dec 2019
2012 1.5 dci engine

Any thoughts folks got me stumped

 

[Fummins]

Is there more than one temp sensor by chance?
I guess a guy could always rig up a wire from the relay to a momentary switch if you couldn't figure it out.

I'm not much help, all our nv's only came with gas engines over here. Basically, anything diesel or gas has to be plugged(block heater) here with it being -34C today.