POTTERTON PROMAX 33 COMBI Boiler Issue

[boiler101]

Hello,

I have a Potterton Promax 33 Combi boiler - GC: 47-393-49 and having some issues.

I have changed the diverter valve, temperature sensor, and DHW filter. When I try to reset the boiler it doesn't seem to be doing anything, does anyone know how this can be checked or the selector switch how can that be checked to confirm if it is functioning correctly?

Note: There are no error codes appearing on the boiler

Many Thanks

 

[Fitter30]

Here's their service manual. Look at page 55 - A. There are two fuses one is internal other is external. Page 53 a flow chart. Never heard of this brand manual is written different from the manufacturers from the states

POTTERTON PROMAX COMBI HE PLUS A RANGE INSTALLATION & SERVICE INSTRUCTIONS MANUAL Pdf Download

View and Download Potterton Promax Combi HE Plus A Range installation & service instructions manual online. Condensing Combination Boiler. Promax Combi HE Plus A Range boiler pdf manual download. Also for: Promax combi he plus a series, Promax combi 24 he plus a, Promax combi 28 he...

www.manualslib.com

This manual has a little easier wiring

https://www.google.com/url?q=https://www.freeboilermanuals.com/assets/pdf/potterton/promax_ultra-combi_compressed.pdf&sa=U&ved=2ahUKEwiRzpfThPKFAxU3jokEHbM4DdQQFnoECAkQAg&usg=AOvVaw0GE1Gbd2uvaMElQg4wdPRd

 

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[boiler101]

Thanks fitter30, fixed one issue but got following two:

1. When I turn the thermostat on, the boiler is igniting approx 2 mins after the demand for central heating. Any ideas what could be cause of this?
2. The DHW has been set to full heat now and still the temperature of the water is only luke-warm? What could be checked for this part?

I took off the plate heat exchanger and that doesn't look that dirty so abit weird. Diverter valve I changed as well 2 days back.

 

[Fitter30]

When was the dhw side cleaned with vinegar. This is yearly or more maintenance.