How To Install/Replace Honeywell Thermostat T6360 To CM907 Problems

fonzyg50

hi Peeps

i have a problem and am seeking advice, i have a baxi 105 he combo boiler with a dial thermostat honeywell t6360, i would like to replace this with the new 7 day programme digital CM907. i have installed the new one but the boiler keeps blowing its fuse.

HONEYWELL T6360 WIRING WAS

TERMINAL 1: BROWN
TERMINAL 2: BLUE
TERMINAL 3: YELLOW/GREEN

HONEYWELL CM907 WIRING I DID WAS

TERMINAL A: BROWN
TERMINAL B: BLUE

YELLOW/GREEN I TAPED UP.

don't know what I've done can someone advise please

espresso

fonzyg50 wrote: »

hi Peeps

i have a problem and am seeking advice, i have a baxi 105 he combo boiler with a dial thermostat honeywell t6360, i would like to replace this with the new 7 day programme digital CM907. i have installed the new one but the boiler keeps blowing its fuse.

HONEYWELL T6360 WIRING WAS

TERMINAL 1: BROWN
TERMINAL 2: BLUE
TERMINAL 3: YELLOW/GREEN

HONEYWELL CM907 WIRING I DID WAS

TERMINAL A: BROWN
TERMINAL B: BLUE

YELLOW/GREEN I TAPED UP.

don't know what I've done can someone advise please

You have effectively connected Live to Neutral with the CM907

Should be:

TERMINAL A: BROWN ( Live)
TERMINAL B: YELLOW/GREEN (Switched Live)

BLUE TAPED UP (Neutral - not required)

fonzyg50

espresso wrote: »

You have effectively connected Live to Neutral with the CM907

Should be:

TERMINAL A: BROWN ( Live)
TERMINAL B: YELLOW/GREEN (Switched Live)

BLUE TAPED UP (Neutral - not required)

thanks i will try that.