Vaillant ecoTec f75 error

[bobazanetti]

Hi, after reading about the dreaded f75 error on several forums I am now going to attempt to change the sensor myself. Is this an easy thing to do? Anyone got any instructions/tips before I scold myself

cheers

 

[gas4you]

Turn off electric to boiler at fused spur.

Isolate boiler at valves under it.

Drain boiler by drain tap only under boiler.

Have a small towel handy to put under sensor before removing it, as some water will come out.

Don't let anywater get on boiler electrics.

Once done, valves opened and repressurised run boiler purge cylce, 'P0' before using.

 

[Beerlover]

Repressurise the expansion vessel to .7 bar (10 psi) while the boiler is drained down.

Big grey tank to the right, use a standard foot or bike pump.