Glow-worm - Brrrrr! It's getting cold out there! If your #GlowWorm boiler shows fault codes F1, F4, F28 or F29, it means you have a #frozencondensatepipe. Here's our handy guide to dealing
how to fix an f29 or f28 error on your boiler | An F.28 or F.29 error on a combi-boiler means that you might've knocked the meter or ran out of gas