Grant Boilers Guide

Hi Guys,

I have a Grant Combi boiler model 90 v3. It is 9 years old, it is kept in the basement and has annual services done every year since I bought it. So far is was doing really fine. Recently I realized that boiler heats up the water, but then is not able to keep this temperature up, so every minute of washing up the dishes water is becoming colder and colder. I am sure it is not a normal operation. Can someone help giving an idea what can be the issue?
Best Regards

Dan

Hi Dan

There are two things that can be faulty in your case. I would most probably check/replace both, but you decide what you do in your case. After resetting check if your burner motor runs constantly, but it can’t fire up- if yes, then the burner need to be exchanged. If it fires up then there is an issue with an electrical flex and you will need to replace a microswitch.