Hi Guys,
I'm a complete novice trying to figure out a problem with my central heating/hot water.
Problem is that I'm getting HW when the programmer is set to CH ONLY. HW ONLY seems to be just fine (complete opposite of what most folk seem to have a problem with.)
I've got what looks to be a Y plan system with a Honeywell 4073 3-port valve with genuine Honeywell actuator fitted.
I've taken a look inside the actuator which seems to respond to all three possible positions as instructed by the programmer when powered up.
I've checked the valve spindle and it seems to be moving fairly freely (by hand). Although it has just a small range of movement, you can sense the rubber ball closing off the valves at each extreme of movement.
Can anyone think of a reason why hot water is still passing the valve and heading to the water heating tank?
Thank you!
I'm a complete novice trying to figure out a problem with my central heating/hot water.
Problem is that I'm getting HW when the programmer is set to CH ONLY. HW ONLY seems to be just fine (complete opposite of what most folk seem to have a problem with.)
I've got what looks to be a Y plan system with a Honeywell 4073 3-port valve with genuine Honeywell actuator fitted.
I've taken a look inside the actuator which seems to respond to all three possible positions as instructed by the programmer when powered up.
I've checked the valve spindle and it seems to be moving fairly freely (by hand). Although it has just a small range of movement, you can sense the rubber ball closing off the valves at each extreme of movement.
Can anyone think of a reason why hot water is still passing the valve and heading to the water heating tank?
Thank you!