Our greenstar 24i system is 2yrs old and worked perfectly until a month ago. Suddenly stopped, now works very intermittently and getting worse. The fitters have gone bust and the new co do not want to know - they have serviced boiler but won't look at anything else. WBosch (5 year service agreement - apparently covers boiler only) say the boiler is working fine BUT could be Dayton RF thermostat or Valves.
Green light on receiver and intermittent red light - sometimes just flashes once - other times flashes several times as per documentation, room thermo had batteries changed and seemed to be ok after a couple of days but problem is now getting worse.
Stops and starts at whim. Does not seem to affect hot water.
Is there any way of excluding problem between thermostat/receiver and sticking valves or any other possible cause.
This system cost nearly £4k and cannot afford open ended additional expense. We thought it would see us out.
