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Hi everyone, I have Vaillant EcoTech boiler that's been fine during the summer, but now that's Winter I'm having to drain approx 2 litres from the heating circuit every 1-2 days. I'm puzzled to understand why. Simple logic tells me that if the filling loop was slowly leaking water into the...

I didn't check the capacitor rating and my logic was based on the fact that the brief application of the hairdyer on the pcb fixed it. I still have the old pcb and will check the capacitor and get back to you.

Well it could be. I just had another look and although it's difficult to see in the photo there is more staining round the base of the capacitor. In fact, there's slight staining around the identical capacitor on the left. Whatever caused the fault I wouldn't trust the job done by only...

I've been experiencing the exact same problem with F27 and F62 errors occurring. To remedy the problem i simply pressed the resent button and normally cures it. However, last Friday even that didn't work and after reading you post tried the hairdryer trick and it worked. I suspected the...