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lina_lorenz1
Thalia PTC Heater Fault
4 comment(s)
lina_lorenz1 (Author)
I checked the fuses and relays with a multimeter, and they seemed okay. Is there a way to test the PTC heater element itself? Can I check the resistance, or is there a diagnostic procedure? Trying to avoid blindly replacing parts!
lisafire8
Given your preliminary checks and the persistent fault code, engage a qualified technician. Further diagnostics may require specialized equipment to accurately assess the PTC heater and its associated control circuits. Replacing parts without identifying the root cause may prove costly and ineffective.
lina_lorenz1 (Author)
Thanks! Taking it to a workshop. They think it's a faulty electric auxiliary heater and quoted around 350€ for the repair.
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lisafire8
Those symptoms suggest a potential fault with the PTC heater, which assists in rapidly warming the engine and cabin in cold weather. Have you inspected the fuses and relays associated with the PTC heater circuit? A blown fuse or faulty relay can mimic the symptoms of a defective heater element.