most (if not all) thermostats will work without a neutral. the neutral makes the thermostat more accurate. Oldtimer wrote a post on this subject a while ago. Ill see if i can find it.
Also dont be afraid to try the thermostat out, using a bit of flex, close to the boiler. you will find out for definate then!
Reply to thermostat in the Australia area at ElectriciansForums.net
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