Mark1306

@Scotland I am in same rabbit hole with UH8, NeoStat wireless stats and FTC6 on my cylinder. System worked fine for months but has been chewing through energy recently, irrespective of outside temp. My installer disappeared and there is no Mitsubishi authorised agent close. Remote help from other installers hasn’t changed the situation. There was never any connection from the heat enable on UH8 to FTC6. ASHP is running almost all the time. How should this have been wired and why did it ever work?