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Valliant turbomax 837e

Dangee

Dangee

Joined
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Hi guys (&girls) 1st post!!!
Weird problem when boiler running in hot water & heating, fan (& burner presumably) rapidly modulating high & low (but not going out).
All getting to heat ok but unusual modulation. Had quick look today but returning tomorrow.
Any pointers???
 
Yes, move this post to the Plumbing and Heating section (you've clicked the wrong section)
 

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