What if the water valve of Audi a4 heater is out of power?

Re-energize the lead of the solenoid valve. The connector of solenoid valve product is not installed firmly, and it falls off loosely, resulting in the solenoid valve circuit unable to be energized. The solution is to check the solenoid valve connector and re-energize. Audi A4(AudiA4) is a B-class car made by FAW-Volkswagen, which went on the market in April 2003.