my isar m30100 is not working code F L flashing

bill, January 2010

there will be a loop on the boiler(a flexy pipe) should be a screw there just turn but dont let pressure buid up passed 1 and a half .
if its not at bottom of boiler some new houses are fitted with this flexy under the kitchen sink fied to pipes going into taps .hope it works

lee, January 2010

ISAR-Boiler FLASHING L & F
I can confirm the first post - I had the same problem and I've found out that the condensing pipe (which drains water from the condenser) had become frozen where it goes outside. As a result water backed up the pipe and I guess the boiler has a sensor to detect that. I don't know if its standard but I was lucky, the condenser pipe was soft-ish black rubber just pulled over the plastic drainpipe so I was able to easily remove it without having to actually access the boiler. I now have full facilities back but cannot connect the pipe back until I know it is unfrozen.

DanndyMann, January 2010

try reset and turn on hot water if not check condensing pipe for a blockage

azza, January 2010

hI, i'VE JUST MOVED INTO MY NEW HOME AND CURRENTLY HAVE A CHAFFOTEAUX AND MAORY BRITONY COMBI SE AND THE PRESSURE HAS DIPPED TO ZERO ON THE VALVE.

I HAVE NO INSTRUCTION MANUAL AND MY HOUSE IS NOW FREEZING APART FROM GAS FIRE IN THE LOUNGE.

CAN YOU ADVISE HOW TO TURN UP THE PRESSURE?

KITCHO, January 2010