potterton proforma 28 combi

[yelbis]

I have a three year old unit. the hot water has decided to cycle, by this i mean goes hot and then cold. the hot improves if i reduce the flow.

The same problem occorred 1 year ago. I had a new plate heat exchanger and a water softener fitted (looks as though the softener does not work).

Is it the same fault, can i put the exchanger into an ultra sonic bath or descaler.

Does anyone have or know the price of a new exchanger.

Thanks.

 

[Agile]

It will be the plate heat exchanger blocked again because you did not power flush or otherwise treat the system to remove dirt.

I have no reason to suspect your softener is not working properly.

Tony

 

[yelbis]

The plumber injected a solution into the system, this was possibly the central heating though. No power flush was undertaken.

Thanks for your reply, what you say makes perfect sence.

 

[bengasman]

If the stuff that was put in the system is a cleaner and the dirt is not removed when loosened up, you have even more chance to block the plate exchanger. No need for a new one, cleaning the system should take care of it.

 

[yelbis]

please advise what product will clean the system.

 

[ChrisR]

Do you mean the system or the secondary heat exchanger?

If you do a search you should find plenty on both.
See "powerflush"
"DHWHE"
"blocked"