Honeywell ST6400C Programmer reboots itself when CH+HW programs turn on
Honeywell ST6400C Programmer reboots itself when CH+HW programs turn on
Hi - I have inherited an old ST6400C when we moved in 7 years ago. I'd guess its 15 years old looking at the agr of the boiler etc. Generally been working OK but I recently replaced the mechanical dial wired thermostat ( see pic ) with a meross mts200b ( see pic ).
Since then ( it may only be a coincident ), fairly regularly, but not all the time, the programmable timer (ST6400C) will just reboot ( continuously) when CH+HW go live.
I believe the mts200b wiring is correct - the switched...
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by rumbln
This has been automatically posted in the DIYNot Forum on DIY Talk. The new DIY Forum
Honeywell ST6400C Programmer reboots itself when CH+HW programs turn on
Hi - I have inherited an old ST6400C when we moved in 7 years ago. I'd guess its 15 years old looking at the agr of the boiler etc. Generally been working OK but I recently replaced the mechanical dial wired thermostat ( see pic ) with a meross mts200b ( see pic ).
Since then ( it may only be a coincident ), fairly regularly, but not all the time, the programmable timer (ST6400C) will just reboot ( continuously) when CH+HW go live.
I believe the mts200b wiring is correct - the switched...
Read more
by rumbln
This has been automatically posted in the DIYNot Forum on DIY Talk. The new DIY Forum