Inastalled 2015 no pressure loss issues till Jan 2023 lost pressure overnight F22 low pressure
Recharge back to 1.8 bar
Lost again overnight end Feb2023
No system leaks
Re[placed Heat exchanger internal leak and recharged expansion vessel under warranty
Ok till Nov 2023 losss again overnight
Loss again Jan 2024
Drop test for 3 hrs only 0.1 bar loss
Vaillant say system leak but each time no damp or water seen antwher inc under carpets etc
Could it be pressure relief valve but no water at discharge point
Can anyone help?
Recharge back to 1.8 bar
Lost again overnight end Feb2023
No system leaks
Re[placed Heat exchanger internal leak and recharged expansion vessel under warranty
Ok till Nov 2023 losss again overnight
Loss again Jan 2024
Drop test for 3 hrs only 0.1 bar loss
Vaillant say system leak but each time no damp or water seen antwher inc under carpets etc
Could it be pressure relief valve but no water at discharge point
Can anyone help?