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Different car
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Section 673 (Diagnostic Trouble Code Index DTC: HVAC Control Module (HVAC) -- Discovery/L462)
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Diagnostic Trouble Code Index DTC: HVAC Control Module (HVAC)
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Description And Operation
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DTC B1D23-85: Overheat Sensor - Signal above allowable range
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Possible Causes
Possible Causes
WARNING:
This page is about a different car, the 2018 Land Rover Discovery and 2017 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.
Fuel fired booster heater internal failure