samboy Posted August 9, 2022 Report Share Posted August 9, 2022 My friend has her C/H switched off and the thermostat set to zero but 3 of her rads are coming on. Any idea why ?. Thanks all. Quote Link to comment Share on other sites More sharing options...
fse10 Posted August 9, 2022 Report Share Posted August 9, 2022 If she has been using the hot tap before hand, it could be a faulty diverter valve in the boiler. Quote Link to comment Share on other sites More sharing options...
TIGHTCHOKE Posted August 9, 2022 Report Share Posted August 9, 2022 Watching this one with great interest. Quote Link to comment Share on other sites More sharing options...
mellors Posted August 9, 2022 Report Share Posted August 9, 2022 Had the same with mine new motorised valve. Easy fix. Quote Link to comment Share on other sites More sharing options...
old'un Posted August 9, 2022 Report Share Posted August 9, 2022 What type of central heating does she have? Quote Link to comment Share on other sites More sharing options...
samboy Posted August 9, 2022 Author Report Share Posted August 9, 2022 25 minutes ago, old'un said: What type of central heating does she have? Don't know and won't be seeing her for 2 weeks. Quote Link to comment Share on other sites More sharing options...
Wilts#Dave Posted August 9, 2022 Report Share Posted August 9, 2022 Most likely she has a 2 or 3 port valve and hot water is getting past when the valve should be closed (when the boiler is on to heat up the hot water)…..valve/head and base replacement if so. Quote Link to comment Share on other sites More sharing options...
Madhatter2132 Posted August 9, 2022 Report Share Posted August 9, 2022 I had the same a couple of months back when using the shower. The boiler had been off for a few weeks while I got parts to fix it and the divert valve had stuck, eventually loosing my rag and wailing the p**s out of it did the trick it seem 🤔 Quote Link to comment Share on other sites More sharing options...
samboy Posted August 9, 2022 Author Report Share Posted August 9, 2022 (edited) It's a Baxi. About 10 years old. Edited August 9, 2022 by samboy Quote Link to comment Share on other sites More sharing options...
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