Gravity fed tank heating and hot water system has a 3 port Honeywell zone valve switching between HW and CH.
It appears that the valve is locked open. as whenever the HW is on, the radiators heat up.
The manual lever on the valve is constantly loose (no matter what state the system is set to) so I thought it might be a jammed motor. On taking the top off the valve head though, it seems the lever doesn't engage the gears or return valve at all, regardless of whether the motor is attached or removed.
Could this still be a motor problem, am I looking at the whole valve head being shot, or is it the actual valve paddles being jammed?
Thanks in advance.
It appears that the valve is locked open. as whenever the HW is on, the radiators heat up.
The manual lever on the valve is constantly loose (no matter what state the system is set to) so I thought it might be a jammed motor. On taking the top off the valve head though, it seems the lever doesn't engage the gears or return valve at all, regardless of whether the motor is attached or removed.
Could this still be a motor problem, am I looking at the whole valve head being shot, or is it the actual valve paddles being jammed?
Thanks in advance.