Clogged heat exchange - Boxxer 421

[carpetcleaner]

I lost pressure today in the middle of a job. TM was showing pressure on the gauge. I traced back and found my exhaust HE is clogged. First time clogging a HE for me. Will TM descaler unclog it or will it have to be taken out?

 

[adamh]

Boxxers are famous for that problem.

Back pressure from clogged Boxxer HX has caused many an engine to blow its head gasket.

 

[ronbeatty]

You mean like these . :roll: :roll: :roll:

 

[daniel@procarpet]

That is a big hx'er

 

[Erik]

Had a Steamway 2100, the coil plugged up. I had no flow at all, took it out Dead-headed it with 3,000 PSI backwards. It let loose all kind of scale, rust, descaled it was all good.

 

[carpetcleaner]

I was thinking of hooking the pump to the wrong side of the HE and seeing if it would flow in reverse. I will try to descale it first.

 

[The Magician]

Check your orffice first then descle then do what you posted. With nothing works Call Hm service dept. A radiator shop can descale it after you clean it up.

 

[charles]

Thats the best reason to always use soft water, my machine
has 3500 hrs and never been descaled.

I bought a container of Prochem descaler when I purchased my
machine but I've never used it.

 

[Larry B]

Take it to a radiator shop and have them dip it in the tank. Cost $20.00 or less and is faster then messing with it.