Nu-heat underfloor heating problem?

17 Feb 2008
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United Kingdom
Hi folks

I got asked by a mate last night to have a gander at his underfloor heating.

He has a Grant vortex combi 26 with Nu-heat underfloor system (with remote mounted pump module), I don't know enough about underfloor heating and thought you guys could clear some things up.

In a space of 2 months the system has used 500 litres of oil, is this to much? Also, even with the central heating off the pipes around the remote pump are scorching hot, showing that the boiler is firing, any ideas?

Thanks in advance

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Had exact same conversation with my neighbour last night!

As this will be the blind leading the blind (as I have no idea about his system or yours or anything to do with underfloor heating), I can only repeat what he found out, he eventually found it to be the zone valves not working. The boiler was firing all the time but heat was not getting into the radiators via these valves so not allowing the room stat to kick in to stop boiler. viscious circle, costing him loads in gas.

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