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my potterton 100e not working the ch?

my potterton 100e doesnt send hot water to the radiators the hot water to the taps is fine .can anyone help.

leon
leon, December 2006
check the PCB behind the main panel are any of the relays blackened, I am on my third PCB board. I am now looking for some one to replace the relays.

See post below

Added By John H (john.dcac@tiscali.co.ok) On Thu Jun 23 22:27:38 2005:
The circuit boards on these are at best 'poor'!! (crap would be a better word) Poor quality and poor design. Fitting 85 degree working capacitors in this working environment is something a 6th form school boy would not do. Just do a blanket change of all the caps with 105 degree and re solder suspect joints with high meting point solder (Sony and B&O use it in power supply circuits, but they produce quality kit)
Whilst your at it, change all the relays(contact burning through using low temp capacitors)Total component cost about £12-00 from Farnells or RS Components. Also buy some de solder braid as the print on these PCB's is also cr*p.

Gansee, December 2006
link Click here to see other fixes for Potterton.