Can a faulty radiator fan cause overheating in a Hyundai Elantra?

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Can a faulty radiator fan cause overheating in a Hyundai Elantra?

My 2019 Elantra in Lahore overheats mainly when the AC is on. A mechanic suggested the radiator fan might not be working properly. Could a faulty fan o r fan sensor cause engine temperature to rise quickly? How can I test this without going to a dealership?

Gari Specialist asked on 10 Jul 2025 16:15:12 pm

1 Answer

11 views |

Gari Master - on 10 Jul 2025 16:18:29 pm

Yes, a faulty radiator fan o r fan control module is a major cause of overheating, especially when using AC o r idling in traffic. In Pakistan, this issue is more frequent due to:

High temperatures

Poor-quality wiring o r electrical relays

Aftermarket modifications interfering with sensors

Symptoms of a faulty fan include:

Engine overheating while stationary

Cooling down only when driving at speed

AC performance s sharply

How to check:

Start the car and let it idle until it heats up with AC on

Open the hood — the radiator fan should turn on once the temperature reaches a certain point

If it doesn’t, the problem may be with the fan motor, sensor, o r wiring

Solution: Replace faulty fan motor o r control unit. Use OEM Hyundai parts for best results.