danfoss fp75 control panel for GLOW WORM ULTIMATE boiler has a small battery icon flashing permanently resulting in boiler not working even though the unit has not been disconnected from mains as stated in booklet any ideas as i cannot get heating/water

harry, April 2007

I just done this also, it is a real pain to get the battery off as it is micro welded onto the connection plates..

I removed the connector plates by unslodering them from the board and bought a new battery and a battery holder from maplin.

Holder £0.45 and the pins fit right into the holes on the board, i recon they are a standard size.

I found it impossible to fit the battery back onto the original plates...

Sparkymalarky, September 2008

Hi Harry
I had exactly the same problem this morning.
Undo the 2 screws at the bottom of the unit and lift unit up, off its wall mounting (careful as the wires behind are live)

Turn the unit round - and undo the 4 screws on the back (again be careful as the buttons may fall out of their holes!). On the back of the circuit board is a round, 3v lithium battery. Unfortunately, its kind of pinned to its connectors so you'll have to use a pair of pliers to prise it out.

The reverse the procedure, making sure the battery is well connected to its terminals.

Good luck
ali

alicoates, April 2007