On 11/11/2019 10:10, ~BD~ wrote:

Hi

Since my son recently picked up and 'fiddled' with my remote Honeywell
sensor for my central heating system, I been experiencing erratic
behaviour of my heating system.

The receiver unit in my airing cupboard had a red light instead of
green. I've changed the batteries in the sender unit and have myself
'fiddled' with the controls until everything appears to work properly.

This morning, though, there was once again a red light on the receiver
unit and the bathroom radiator was cold. Although the pipes around the
tank were hot, there was was once again a red light on the receiver
unit. I've pressed the reset button and the central heating pump is
running again and the bathroom radiator is getting hot.

Has anyone any suggestion about possible cause and how to rectify?

Just thought I'd let you know that everything is back to normal.

It's amazing how often unplugging electrical items from a power source
magically fixes things! ;-)

Thanks, guys.