Error 9 on Autoterm Air / Planar auxiliary heaters
What does Error 9 mean
If this error is shown on the heater's display (or 4 x blink on the PU-5 control panel), the glow plug can't be detected electrically. The start attempt fails because the glow plug can't be controlled and heated up.
Cause
As a rule, the ceramic of the glow plug has been broken by force; a glow plug that is defective on its own is extremely rare. In almost all cases it is therefore a classic transport damage.
Repair
Once the warranty period of the heater has expired, the repair can certainly be done yourself. However, keep in mind that mistakes can easily happen here, since parts can be installed the wrong way round and the ceramic of the glow plug is relatively delicate.
We recommend having the repair done by an authorized service partner, especially since any warranty period still running would otherwise expire.
Fortunately, damage of this kind does not occur often.
The other errors are:
*Required fields must be filled in.