Aquahot fluid leak at radiator cap

[Barryc737]

Hopefully, it's just in need of a new radiator cap and not an issue with the filler neck. I've mopped up the mess...and shut down the system. Plan to examine the cap tomorrow after cool down and pumping out the expansion tank.

I believe it's supposed to be a 13# cap. Hopefully, that's a standard item at the local auto parts store here in Torrey, Utah.

Any other thoughts, tips, suggestions? What am I missing?

Thanks! BTW it's a AHE-450-D1 about 10 years old.

[ByeTheWay]

Here is a link in case it is more than a Cap:



Roger Berke: RV Hydronic Heater Repair - Home (RV Hydronic Heater Repair - Home)

[Mr_D]

Probably the filler neck leak. Common enough problem that they make a repair kit for it. One just replaces the filler neck and requires soldering in and a gasket, cost is about $63. Then there's the deluxe no solder repair for $350.

[Barryc737]

Thanks all, for the intel. Found the filler neck kits on line. Hoping I don't have to go down that road, but I have a suspicion it's not the cap. Has anyone had any experience with either of the repair kits?