Ecofit pure 830 hot water problem

[Andrew Edmondson]

2 year old Ecofit Pure 830 has intermittent how water, recently none.
Heating OK.
Replaced diverter valve and pressure sensor.
Next step PCB replacement?

 

[muggles]

Should still be under warranty at 2 years old. Why aren't Vaillant fixing it?

 

[cross thread]

If your guessing at parts you could get vaillant out on a fixed price basis for the price of a pcb.

 

[Andrew Edmondson]

Thanks for the replies guys.

 

[CBW]

Check for crossed pipes/passing mixer, isolate cold feed to boiler and run a hot tap, if you have running water then you have crossover/mixer passing.

 

[Andrew Edmondson]

OK, just returned from a month's holiday. Replaced PCB, flow sensor and diverter valve. CH working fine. HW codes oscillate between S11, S13 and S15, with very occasional S14 firing. Mains water pressure 15l/min. Mystified.

 

[CBW]

OK, just returned from a month's holiday. Replaced PCB, flow sensor and diverter valve. CH working fine. HW codes oscillate between S11, S13 and S15, with very occasional S14 firing. Mains water pressure 15l/min. Mystified.

Did you replace these parts? If yes, why wasn’t it done under warranty - that’s mystifying. I would check the D70 code.

 

[Andrew Edmondson]

5 months outside 2 year warranty unfortunately. Yes replaced these parts. There is no d70 code but the diverter valve operates correctly, as seen in other D codes. I'm wondering of the new flow sensor is faulty. Happened to me once when I bought a replacement condenser for a car.

 

[CBW]

There is a D70 but you need to enter into the 2nd stage parameters to get it. It’s in the installation manual. Anything else advisory on here would relate to gas advice as you have replaced the parts and don’t claim to be gas safe not competent to check after removing a cover that forms part of the combustion circuit.

 

[Johntheo5]

Have you tested as per post# 5?

 

[Andrew Edmondson]

Yes thanks Johntheo5.

I don't see any second stage parameter access in the manual. D35 gives the current position of the diverter valve.

 

[Johntheo5]

It also shows in d.70 as having 3 settings, 0,1&2, I presume 0 is DHW or heating since its a combi?, but the mid position option seems strange for a combi, if settable?. What setting is it on and what is it (d.35) showing with DHW on?.

I remember a somewhat similar problem last year.

Combi boiler intermittent fault: Vaillant EcoFIt pure 830 does not respond when HW demanded

Can anyone advise please. Since installation (Jan 2020) there has been an occasional/intermittent problem with this otherwise brilliant boiler: no HW water comes, even when the tap demanding it is the one closest to the boiler. Leave it half an hour, open any HW tap and there is instant...

www.diynot.com

 

[CBW]

It also shows in d.70 as having 3 settings, 0,1&2, I presume 0 is DHW or heating since its a combi?, but the mid position option seems strange for a combi, if settable?. What setting is it on and what is it (d.35) showing with DHW on?.

I remember a somewhat similar problem last year.

Combi boiler intermittent fault: Vaillant EcoFIt pure 830 does not respond when HW demanded

Can anyone advise please. Since installation (Jan 2020) there has been an occasional/intermittent problem with this otherwise brilliant boiler: no HW water comes, even when the tap demanding it is the one closest to the boiler. Leave it half an hour, open any HW tap and there is instant...

www.diynot.com

View attachment 301312


View attachment 301311

0 will provide heating and hot water as denoted in brackets, mid position and permanent heating presumably if setup as system boiler.

 

[Andrew Edmondson]

D35 set to 0.
I'll try another flow sensor, as they are not expensive. Thanks.

 

[Johntheo5]

What about the DHW temperature sensor?.