Palisade Auxiliary Heater Defect

Good day. I understand you are experiencing issues with your auxiliary heater. The error memory is indeed a good place to start. Before you proceed with disassembly, may I ask if you have checked the relevant fuses and relays associated with the auxiliary heater system? A blown fuse is a surprisingly common cause of such malfunctions, and checking it could save you considerable time and effort. Additionally, consider inspecting the wiring harness for any signs of damage or corrosion, particularly around the heater unit and the glow plug connector. A multimeter can be used to test the continuity of the glow plug circuit.

Thanks for the reply. Fuses and relays – good shout, hadn't thought of that. I'll check those first thing. When you say 'continuity of the glow plug circuit,' could you elaborate a bit? What readings am I looking for with the multimeter?

Certainly. By 'continuity,' I refer to a complete, unbroken electrical path. When testing the glow plug circuit with a multimeter, you would typically set the meter to measure resistance (Ohms). A healthy glow plug should exhibit a low resistance value, typically less than 1 Ohm. An open circuit, indicated by infinite resistance or 'OL' (Over Limit) on the multimeter display, signifies a break in the circuit, which often points to a defective glow plug. However, given the symptoms and the potential complexity of modern climate control systems, I would also strongly advise consulting a qualified Hyundai technician. A professional diagnostic scan might reveal further error codes and pinpoint the problem more accurately, saving you potential misdiagnosis and unnecessary parts replacements.

Appreciate the detailed explanation and advice. Fuse was fine, and the glow plug resistance was way off, so you were spot on. Ended up biting the bullet and took it to a shop. As suspected, defective glow plug. Total damage: 440€, parts and labour. Thanks again for the help!