Hi D,
Thanks for your quick reply.
As you can understand from my questions, I'm totally clueless :)
1.The red pump is the one that started to work more than usual.
The black one works only when we take a shower.
2.I've been advised to keep the HW ON all the time. Is it less...
Hi to all,
I moved to a new flat recently with an old Honeywell heating system.
We managed to operate the system fine until now, but suddenly the pump seems to work over time, and makes an annoying humming sound every too often, without us using the water. This wasn't before and I think we...