I have an ET4 RF thermostat. The transmitter stops working due to the battery
corrosion. Now I contacted original supplier, TFC Group LLP for the replacement,
but was advised that this product was discontinued. I was advised an equivalent,
Celect DRF2 RF programmable thermostat. My existing ET4 receiver is currently
showing red light. Please advise if the ET4 receiver lost the communication with
the transmitter, or we do not use heating in the summer, so showing the red
light. Should I just change the transmitter or both the RF transmitter and RF
receiver? Is Celect RF transmitter compatible with my existing ET4 RF receiver,
as both have identical user manual and both communicate at 433.92MHz? How
should I prevent battery corrosion in the future?
Oo, I'd have thought battery corrosion would be easy to monitor. One
assumes these batteries are easy to see?
As for the rest, well, the frequency may well be the same, but is the
method of communication the same.
This is the crucial question.
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