Motorised zone valve mounted the wrong way round

[jeff the gasman]

How does anyone with any brains put a valve on the wrong way round unbelievable I suspect the
plumber left it cos he knew he'd get called back.The trick is don't have him back get a proper plumber in to swop the valve round,this will proberly sort out the problem.Bob.

Bob, it is with a heavy heart I have to inform you that some monkeys masquerade as heating engineers.
I hope you get over this. Deirdre said look at my E leaflet if you have been affected by this. X