Leaking boiler--What are my options?

I have seen the lines overtightend to the piont of cracking or cutting the steel tube inside the nut. replace the line and do not overtighten.

Get someone to replace the line and compression fitting. The picture is fuzzy but it appears to be a copper tube. The steel nut has a tapered steel ferrel inside it. When you tighten a compression fitting the steel ferrel crimps into the softer copper tube. That is what allows it to seal tightly. If you overtighten the fitting, the steel ferrel cuts deeper into the soft copper to the point that it cuts through it.

Replace the compression fitting and the short section of copper tubing. Shouldn't be more than around $75 including the service call charge.

Great advice! Thanks, all. I'm liking the sound of $75 a lot better than $750!

Scottsman wrote:Great advice! Thanks, all. I'm liking the sound of $75 a lot better than $750!

I believe the big-box stores carry the tubing and the compression fittings that you need. DO-IT-YOURSELF, and I bet the cost would drop to $20-$30.
Just take the old fittings & tube with you, so you buy the right ones.

Finally got that leak fixed. I almost was going to take the thing apart myself, but worried about having it apart, then not finding the right part at the store and going without hot water for a while would not make the Mrs. Happy. Turned out, it was that nut on the supply tube and an o-ring that needed replaced. I did have to call a different service tech, but was much better off taking your advice to not replace the whole burner (like the first tech suggested). Knowledge is power.

Scottsman wrote:Knowledge is power.

..... and a lot cheaper.

congrats!!!!!!