I have a Worcester Greenstar Ri gas boiler, with a Honeywell ST9400C timer and a Honeywell HCW80 thermostat.
For heating up the water during the summer it works fine, however around 2 months the weather turned very cold the heating wasn't coming on, only the hot water was working. I tried changing the batteries in the thermostat but that didn't help.
But then I noticed, that when I repeatedly pressed the small button inside the thermostat the boiler would start heating up the radiators, but when the room temperature reached the level set on the thermostat (21^C) they wouldn't continue to hold that temperature and go cold, as the boiler wouldn't start up as expected.
I had to keep repeatedly pressing the small button inside the thermostat every time I needed the heating on.
After about six weeks of doing this, the small red light on the thermostat eventually stopped flashing, and the radiators stopped heating up.
I bought a new HCW80 thermostat but I think it may need some kind of pairing with the timer and/or boiler.
I would appreciate some advice on how I can get these parts to work together, as the boiler heats the water nicely, but not the radiators.
Thanks!
For heating up the water during the summer it works fine, however around 2 months the weather turned very cold the heating wasn't coming on, only the hot water was working. I tried changing the batteries in the thermostat but that didn't help.
But then I noticed, that when I repeatedly pressed the small button inside the thermostat the boiler would start heating up the radiators, but when the room temperature reached the level set on the thermostat (21^C) they wouldn't continue to hold that temperature and go cold, as the boiler wouldn't start up as expected.
I had to keep repeatedly pressing the small button inside the thermostat every time I needed the heating on.
After about six weeks of doing this, the small red light on the thermostat eventually stopped flashing, and the radiators stopped heating up.
I bought a new HCW80 thermostat but I think it may need some kind of pairing with the timer and/or boiler.
I would appreciate some advice on how I can get these parts to work together, as the boiler heats the water nicely, but not the radiators.
Thanks!
