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Error 2 on Autoterm Air / Planar auxiliary heaters


What does Error 2 mean

Error 2 (or 12 x blink on the PU-5 control panel) indicates a defective temperature sensor.

The measured temperature is in ranges that are not actually to be expected, because the heater would already reduce its output earlier (from 30 degrees) to avoid overheating. See also our detailed explanation under Error 1.

The heater regards the sensor as implausible at temperatures in a range of 40 to 50 degrees, and therefore the sensor as defective. As a rule that is then really the case.


Repair

If the temperature sensor is defective, the main board has to be replaced. If the warranty is to be preserved, this repair should be commissioned from an authorized service partner, since replacing this component also changes the serial number of the heater.

If Error 2 does not appear on your display and you only landed on this error page out of interest in the heaters, we have some reassuring news: a defective temperature sensor is extremely rare and almost never happens.



NOTE: In the form attached below you can register your heater for repair directly if it displays Error 2. In most other error cases the heater does NOT need to be removed and sent back, because the error often has to do with the installation in that particular vehicle - meaning the heater would run perfectly on our test bench. Please therefore read up on the possible problems in our other error videos, and then contact us via the contact form if you need help solving it. For the best possible assessment, upload photos of your installation or the problem. We will first try to help you by remote diagnosis before a heater is sent in. Otherwise we reserve the right to charge for unnecessary tests on our test bench.


The other errors:

Error 1 (1 x flash)
Error 2 (12 x flash)
Error 9 (4 x flash)
Error 12 (9 x flash)
Error 13 (2 x flash)
Error 15 (9 x flash)
Error 16 (10 x flash)
Error 17 (7 x flash)
Error 27 (11 x flash)

Register a repair:

If the heater was not purchased from us, the dealer you bought the heater from is generally your point of contact (especially if it is a warranty claim). If you send the heater to us for repair, we will charge you for our labor hours.

You can find it on the heater sticker below the barcode, as well as on your invoice and in the warranty documents.

*Compulsory for return reason "item is defective", helpful for wrong delivery (picture of wrong item label)
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