11 discussions on HomeOwnersHub about the Honeywell ST6400C: what owners asked, what went wrong, and what fixed it.
Im looking for a 24h CH heating timer programmer, that has separate waterand heating timer settings.To be specific I want the water only to come on at a set time in themorning, and then the heating only to come on at a set time in the...
Good evening.I am trying to replace and old mechanical thermostat with a newwireless digital thermostat. At the moment the system is controlled byHoneywell ST6400C Programmer,The old thermostat is Honeywell T6360 wiring to the old...
All,My 3-port valve is sticking and needs replacing. Although I've done itmyself in the past I'm not really inclined to do it again. My questionis, how much should I expect to pay a plumber for supply and fitting?A direct replacement for...
I plan to install a new twin-coil solar HW cylinder soon, and plan to convert the CH system from gravity-fed to fully pumped at the same time. (Solar coil to be utilized at a later date)Currently the boiler and pump are downstairs with 28mm...
Hi All,I've just moved into a house that has a "Glow worm - economy plus"boiler (in the kitchen), it also has a controller (in the kitchen -see below for more details) and a temperature control (in the lounge).I'd like to replace the...
Hi all,I want to add an additional wire from CH controller (HW Off terminal)to the junction box by the boiler so that I can have the heating onwithout the hot water. At present there is nothing connected to thisterminal.Is 0.75mm wire too...