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Hello
I have a central heating system, with a Y plan layout.
The neon indicator on the thermostat seems to be sometimes dimly lit / flickering even when the thermostat is turned off. I measure approx 50V AC across terminals 2&3 of the thermostat when it is happening.
I have narrowed it down to the following circumstances:
My first instinct is that this could be a problem with the mid position valve when a connection is not being completely broken. However my hesitation with this is that the mid position valve motor and wiring assembly was only replaced only a few months ago.
Does anyone have any thoughts on what might be causing this ?
Many thanks in advance
Joe
I have a central heating system, with a Y plan layout.
The neon indicator on the thermostat seems to be sometimes dimly lit / flickering even when the thermostat is turned off. I measure approx 50V AC across terminals 2&3 of the thermostat when it is happening.
I have narrowed it down to the following circumstances:
- With the hot water off but thermostat set low, the indidator is dimly lit
- When the hot water is switched on, the indicator goes out
- When the hot water is switched back off, the indicator remains out until the thermostat is turned up high enough and for long enough for the heating to kick in (the indicator fully lights as it should).
- Once this happens and the thermostat is turned back down, the indicator is again dimly lit.
My first instinct is that this could be a problem with the mid position valve when a connection is not being completely broken. However my hesitation with this is that the mid position valve motor and wiring assembly was only replaced only a few months ago.
Does anyone have any thoughts on what might be causing this ?
Many thanks in advance
Joe
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