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My Heatmiser Slimline was recently replaced by a Heatmiser Neostat Wifi. The wiring was kept the same, i.e. permanent live to L, permanent neutral to N, the live linked to A1 and the boiler to A2.
However, when this is done the boiler fires irrespective of whether the thermostat is calling for heat.
The boiler still fires even when the front panel of the Neostat is removed, whilst the wires remain connected at the back. Everything else on the device looks to be working fine, including the wifi connection.
When the Neostat is removed and replaced with the original Slimline with the same wiring, the problem is resolved and the boiler works normally.
Is the Neostat likely to be faulty?
Attached is what the Slimline wiring looked like when I removed it and the wiring diagram for the neoStat.
However, when this is done the boiler fires irrespective of whether the thermostat is calling for heat.
The boiler still fires even when the front panel of the Neostat is removed, whilst the wires remain connected at the back. Everything else on the device looks to be working fine, including the wifi connection.
When the Neostat is removed and replaced with the original Slimline with the same wiring, the problem is resolved and the boiler works normally.
Is the Neostat likely to be faulty?
Attached is what the Slimline wiring looked like when I removed it and the wiring diagram for the neoStat.
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