Discuss Why does downstairs heating has to be on for upstairs to work? in the Central Heating Forum area at PlumbersForums.net

It may or may not be identical (how would I know?) but it'll probably sound somewhat similar, i.e. a small motor running for a short period and maybe a clunk at the start and/or end of the travel. If it's a pump rather than a valve it'll running continuously while the zone is active and stop when it's not.
No luck, tried following pipe , listened to noise every room upstairs, no luck im afraid
 

Reply to Why does downstairs heating has to be on for upstairs to work? in the Central Heating Forum area at PlumbersForums.net

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