transuranics
New member
Have recently had our hot water cylinder replaced
The plumber/electrician re-used original HTS3 thermostat
We noticed that hot water seemed to be very hot & thermostat set screw didn't seem to make any difference
Got the plumber/electrician back in - they suggested that thermostat needed replacing
As this unit is ONLY 3 wires - thought I would do this myself
Having got new HTS3 unit
Switched off local timer/control box power in airing cupboard
removed cover off of original HTS3
Took photos of wiring connections
disconnected old unit
wired up new unit
strapped it to cylinder
Switched back on & waited for a while
NO hot water
Switched off local timer/control box power in airing cupboard
removed cover off of new HTS3
checked wiring against photo
Have managed to swap the 'Satisfied' & 'Call for heat' wires over
??Has this killed the HTS3 unit
??Has this killed my timer/control box
Have removed new HTS3 unit
Put back original HTS3 unit --- with correct wiring
Switched back on
Pump comes on for ~5 secs then shuts down
Appreciate any help
The plumber/electrician re-used original HTS3 thermostat
We noticed that hot water seemed to be very hot & thermostat set screw didn't seem to make any difference
Got the plumber/electrician back in - they suggested that thermostat needed replacing
As this unit is ONLY 3 wires - thought I would do this myself
Having got new HTS3 unit
Switched off local timer/control box power in airing cupboard
removed cover off of original HTS3
Took photos of wiring connections
disconnected old unit
wired up new unit
strapped it to cylinder
Switched back on & waited for a while
NO hot water
Switched off local timer/control box power in airing cupboard
removed cover off of new HTS3
checked wiring against photo
Have managed to swap the 'Satisfied' & 'Call for heat' wires over
??Has this killed the HTS3 unit
??Has this killed my timer/control box
Have removed new HTS3 unit
Put back original HTS3 unit --- with correct wiring
Switched back on
Pump comes on for ~5 secs then shuts down
Appreciate any help