marvin_werner1
Seat Tarraco Diesel Overheating Issue
Summary of the thread
A 2022 Seat Tarraco diesel with 138,094 km is experiencing engine overheating and a persistent check engine light. The initial suspicion was a radiator fan issue. Potential causes discussed include physical obstruction of the fan, a faulty thermal switch, or a defective speed sensor. The problem was ultimately traced to a malfunctioning speed sensor, which was resolved by replacing it at a cost of 250€.
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4 comment(s)
marvin_werner1 (community.author)
How exactly do I check the thermal switch? I've dealt with temperature control issues before on my old car, but never this directly related to the fan.
tom_dragon1
The thermal switch is a common failure point. You'd need a multimeter to test its continuity. Given the overheating, it might be best to take it to a workshop. A defective speed sensor can cause the fan to not operate correctly, leading to overheating. It's all part of the engine's cooling system.
marvin_werner1 (community.author)
You were right, the speed sensor was causing the fan to malfunction. Replacement cost 250€, thanks for the help.
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SEAT
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TARRACO
tom_dragon1
Overheating and the check engine light are definitely concerning. Considering the radiator fan, have you checked if the fan blade is physically obstructed? Debris can sometimes get lodged in there. Does the fan motor run when the engine temperature rises? A faulty thermal switch could also be the culprit, preventing the fan from activating. Have you checked the cooling system for leaks?