Boiler turning on even when Evohome is off

[edstrong]

Does anyone have any idea why my boiler fires up from time to time even though I have all rooms and the hot water turned off?
It's not cold inside at the moment so surely not a frost-protection setting in the boiler? I'll try to work out how often and for how long it comes on if that would help.

Ta.

Ed

[Richard]

One of the HR92's out of calibration or needs a reboot?

Have a look under the 'SYSTEM SUMMARY' menu in the 'INSTALLATION MENU' (3+ second 'SETTINGS' button press), to see if there are any demands there?

[edstrong]

Thanks for the advice. There is a red warning triangle in the "Boiler Control - Wireless Relay Box" column and the display does show an error from time to time "Comms Fault - Boiler Relay". Not sure what I can do about this though.

[skwerl]

If your boiler controler (BDR91) loses comms with the main evohome controller and you have failsafe enabled then the BDR91 will cycle the boiler on/off in a 20/80 pattern
Go into evohome controller settings and disable failsafe

[Richard]

Thanks for the advice. There is a red warning triangle in the "Boiler Control - Wireless Relay Box" column and the display does show an error from time to time "Comms Fault - Boiler Relay". Not sure what I can do about this though.

Sounds like the system is not configured correctly. Give Resideo technical a call (number in my signature choose option 3) and they should be able to assist you.