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Wiring up new room thermostat

Former Community Member
Former Community Member
Hi guys


Hope you’re all keeping well and safe?


I need some help with wire colour identification for my new Flomasta and 6259G wired thermostat.  I have worked on any heating/water installs yet, so I’m not familiar with the wiring colours.  My old analogue Honeywell thermostat has 5 wires, Gn/Y, blue, black, light grey and brown.  The Honeywell is wired 1 gn/y, 2 blue, 3 black, 5 brown, light grey isn’t used.  New flomasta uses only 3 wires, Com, NO & NC, I know the NO & NC means open/closed, but which colour wire goes to which terminal?
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  • Former Community Member
    0 Former Community Member
    We’re in a 3 bed house now, with 2 bathrooms, no water tank in loft either, pressure in kitchen is pretty weak to be honest and if the downstairs toilet has been flushed or the washing machine is running, then pressure drops a bit more.   Shower is controlled by a mixer tap with no pump, just on the boiler pressure alone, so flow rate and temp changes if toilet is flushed.  All I can think of then is that our mains pressure is crap.


    Zoomup, the system is serviced yearly by our landlord without fail and no expense spared if any part needs replacing either.
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  • Former Community Member
    0 Former Community Member
    We’re in a 3 bed house now, with 2 bathrooms, no water tank in loft either, pressure in kitchen is pretty weak to be honest and if the downstairs toilet has been flushed or the washing machine is running, then pressure drops a bit more.   Shower is controlled by a mixer tap with no pump, just on the boiler pressure alone, so flow rate and temp changes if toilet is flushed.  All I can think of then is that our mains pressure is crap.


    Zoomup, the system is serviced yearly by our landlord without fail and no expense spared if any part needs replacing either.
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