Heating company wants to replace the pump head, pcb, and transformer. Sounds like an issue they didn't properly diagnose and want to throw everything at it!
i have a 9 year old Worcester Greenstar CDi30 boiler, seems it has an intermittent problem with the pump not running when a call for heating is made, so it heats up internally without circulating the water and trips out until it cools. The pump works fine (replaced 2 years ago), no issues with...