Bridging Honeywell thermostat

[Notaspark0__0]

Installed a hive, won’t bore you with the details but I need to bridge the old thermostat terminal in the junction box. Is it the blue and brown I need to bridge? As with other threads, boiler won’t fire. Gravity fed hot water system, boiler needs water on for heating...

 

[Deleted member 267285]

Looks like brown to green/yellow (number 3), looks like cpc (earth colours) has been used as switch live? Just check wiring

 

[ericmark]

If no room thermostat is fitted, add a link between 1 & 3 on ROOM STAT block.

It would seem from what is seen the damaged green/yellow is switched line, brown is permanent line and blue is neutral and in fact there is no earth.

 

[Dangee]

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[Deleted member 267285]

View attachment 232359 View attachment 232358

How is this relevant to this thread?