Ideal Isar H30?

Ideal Isar H30(2008 model)
The pre heat is now kicking in every 25/30 mins and the boiler heats up very quickly, this use to come on every 45/50 mins.
lawrencewest, April 2023


done
Get a Gas Safe certified engineer to check it. When was it's last annual service?

Ftyde, April 2023