The F22 fault on my Vaillant is getting annoying now. As determined last year, first thing to try is the NTC thermisters on inlet and outlet. Where's the best place to order these from ? Thanks, Simon.
The F22 fault on my Vaillant is getting annoying now. As determined last year, first thing to try is the NTC thermisters on inlet and outlet. Where's the best place to order these from ? Thanks, Simon.
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