Boiler CD28i use Worcester RF receiver with Honeywell CM927

14 Feb 2011
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United Kingdom

I have Worcester CD28i combi boiler installed (fitted by previous owners circa 2003). There is a wireless RF Worcester programmable room thermostat also installed where the RF receiver/relay is a worcester component that fits into the boiler control panel.

All works fine, except after experiencing my first winter I wish to replace the RF controller with a 5/2 programmable room thermostat for greater flexibility and efficiency. I am looking at either Honeywell CM927 or Siemens REV24 (although this appears to be hard to source - discontinued?)

My Q is can i use the existing Worcester RF receiver/relay with either the CM927 or REV24 or will I have to fit the relay that comes with either of the new controllers?

Thanks Jon
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