VW Polo (V) - Reduced heater power | HELLA

If it is discovered that the interior heater power in the

above-mentioned vehicles is reduced, the cause could be an incorrect coolant mixing ratio.

The following steps should be taken to rectify the problem:

• Check the cooant's mixing ratio or antifreeze (-25 to -30 C°)
• If there are deviations, drain the coolant when the engine is cold
• Fill the water and antifreeze in the correct mixing ratio
• Bleed cooling system
• Perform leak check and functional check

In general, this information can also apply to other vehicles. When there is a heater power problem, a faulty coolant mixing ratio should always be considered.