How To Clean Old Plate HE - To Keep For Spare?

[2point8ghiax]

A few weeks back, I posted on here with problems re hw running hot and cold, plus F14 on my GW 30 cxi. Thanks to all on here, I managed to take the plate he out of the back of the boiler without any dismantling, as the boiler is on a frame in the loft.

Anyhow, the old HE was blocked with rust particles. I have thoroughly cleaned and flushed system, and added a Boiler Buddy. The new HE is in, and the boiler works perfectly. Is it possible to clean the old HE, as it seems a shame to bin it. I would like to keep it for a spare.

How do I clean it, and what cleaning agents will remove the rusty particles from inside? Many thanks.

 

[Boilerman2]

Most heating engineers can clean plate HE's using a Power Flush machine and special adapters that fit to the plate

 

[gas112]

Or a ten bob bottle of white vinager and that will clean it overnight give it a rinse in morning then soak it again for a couple of hours . Leaves them like new

 

[David937]

Kamco FX2 is very good, cleans both sides. Do one side at a time; pour in neat and then pour hot water in the other side (works better when hot), leave for 10-15 minutes, rinse it out and repeat for the other side. Flush it out with cold water first.

This method was recommended to me by an engineer on here works brilliantly.

 

[onlyfitidealboilers]

Ds40