Recent content by rallybluecelt

Hi again The valve spindle is easy to move but I'll keep an eye on it as it was stuck it seems. HW is working fine now, activates every time :) Thanks for your help

Sorted (I think) I did the test with the tank stat. Nothing at first then a quiet click but no action. I took the motor housing off the valve - it is the same SM5203 - and switched the stat on the tank to max. I noticed the slot for the valve rotate very slowly (not sure how fast they should...

Hi Well the black CH Off wire goes to the block (;)) and looks to be connected to a Sunvic SM5203 as well as to another wire going up into the loft - I'll check that out later. However, the CH is working after I remembered to check the thermostat :oops: - forgot it was summer with all...

Hi Decided to replace the ageing Switchmaster 805 with the new Honeywell ST9400C (backlit screen - nice :)) Well, Disconnected the Switchmaster, took note of the wiring - as follows 2 connections - 1 had 2 wires Black & Red (1) 1 had 3 wires - Blue, Yellow & Red...