
I have tried pulling out out. Doesn’t come up. Do I have to use a pair of pliers to yank it out?It’s a TRV, not a bulb, but being pedantic as aside, that white piece underneath where the number 4 is looks like a limiter/stopper - this should pull out.

Yes it does move slightly. When you push it up and it gets stuck. It stops in between 4 & 3Shouldn’t do no, does it move at all?

NO! Don’t be sillyyou will just have to persevere with it and find out which way it moves, it is there to prevent young children and elderly from altering the setting, so if you cant do it get a young child to do it, they will soon work it out![]()
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