Paul, do I understand correctly that the engineer comes out, opens the boiler, diagnoses the defect, gives you a price and you do that with other engineers too? Boiler still faulty, two or more guys now wasted time, not earned a dime but increased you knowledge of what is wrong with your boiler. I just admire penny pinchers like you. Am sure there are a few guys on this forum, myself included, who would have given you flea in your ear for wasting time and resources on a task that is essentially an annual service which seems not to have been carried out.
Ha ha! That's about right. But without getting a couple of quotes for a job how do I know the going rate? It's not so much that I am tight but rather I din't want to be ripped off.
But it is ok to take advantage of hardworking grafters and ripping them off. Charming fella
It is not as if you are building a castle.