![]() So, to avoid an overheating issue, the technician cut the test drive short.ĭuring a vehicle health inspection, the technician noticed that, although the air conditioning compressor was operating, the cooling fans weren't. The mechanic did a test drive, discovering that the air conditioning didn't work well at slow speeds. Still, the warning didn't appear when driving at highway speed. They also noticed that the coolant temperature warning light flashed on the dashboard several times during traffic stops on the freeway. In this case, the fan is defective and requires replacement.Ī customer came to the auto shop because their air conditioning only worked at highway speeds. This image shows the radiator cooling fan. Does the issue look like this? if not accessible your shop will document it So, the thermostat wasn't allowing the engine temperature to rise, and the technician replaced it and its housing. The technician also found that the engine's operating temperature wasn't reaching 185 degrees note that a standard thermostat opens at 195 degrees. So, the customer approved additional tests.ĭuring additional diagnostics, the technician found a stuck-opened thermostat. Plus, the heater was not blowing warm air as it should.ĭuring the vehicle health inspection, the technician found nothing related to the customer's concern. ![]() Plus, their car's heater took a long time to warm the interior it only warmed faster when driving at highway speeds.ĭuring a test drive, the mechanic verified the customer's concern and found the check engine light on the car's dashboard. ![]() They'll need to perform additional tests to find out why.Ī customer came to the auto shop because the check engine light on their car's dashboard was active. This image shows a scanner's screen displaying low coolant temperature. Jerking When Accelerating at Low Speeds.What Do My Dashboard Warning Lights Mean?.
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