Refrrigerant R134a Servicing

Test Requirements

~1min read

Radiator and condenser are clean (clean if necessary).

The ribbed belt for the A/C compressor and alternator tensioned correctly.

All air ducts, covers and seals are OK and installed correctly.

The doors reach their end position.

The engine is warm.

Evaporator and heater not drawing in secondary air (at maximum fresh-air blower speed). With engine running and A/C system set to maximum cooling output, pay attention to the following points:

The fresh air blower is running.

The coolant fan must be running or it must be switched on.

The recirculation/fresh air door must be in the “recirculation” position.

Ambient temperature is greater than 15 0 C.

The A/C Evaporator Temperature Switch -E33- is installed correctly and its switch temperatures are correct.

Test yourself

A quick Volkswagen Polo quiz: every answer comes with an explanation and a link to the manual page.