ecoMax 824, hot water, no heating brrrrr!?

depending how long the thermostat programmer lights were flashing low battery before you noticed programmer may now not be in sync with the boiler , somewhere close to the boiler will be the receiver box when the boiler is in use and in sync with the room thermostat you will have a GREEN LIGHT ON if communication between the 2 is lost through batteries run down, you will get a RED LIGHT
the 2 articles (transmitter room stat,and boiler receiver ) need to be re programed so they COMMUNICATE with each other. in the book this is called BONDING. The FLASHING radiator symbol means the boiler is anti cycling

wirecutterman
October 2009