Faulty Heater?


6 Questions To Help Pinpoint Heater Trouble 

Publication Date: 2021-12-14

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A cold winter day isn’t anyone’s favorite time to troubleshoot a faulty heater. But the alternative – a cold cab and fogged up windshield – can’t be ignored for long.

Unfortunately, a driver might not notice a heater problem until outside temperatures are at their lowest. That’s because the colder it is outside, the more quickly the warm air inside the cab moves to a cooler area. To try to determine what’s causing the problem, turn the heater on and ask yourself these six questions:

  1. Is the airflow strong or weak? Hold your hand in front of each vent. If the airflow doesn’t feel as strong as usual or isn’t steady, you may have a clogged air filter. If airflow in the cab doesn’t improve after cleaning or replacing a filter, a faulty blower motor may be to blame.

  2. Is the fan blowing at only one speed? This can be a sign of a faulty blower motor resistor or switch.

  3. Is the airflow cold? If the air coming out of a vent feels cold, the heater core may have a hole that’s allowing warm air to escape. To fix the job right, you’ll want to replace the heater core.

  4. Is the windshield fogged up? Glass that suddenly fogs up is usually a symptom of a leaky heater core, and the condensation that accumulates on glass is usually caused by hot coolant vapor.

  5. Do you smell a sweet odor? A broken heater core allows coolant to seep out. If you smell a sweet or damp odor in the cab, check under the vehicle for signs of a coolant leak. Also feel the passenger-side floorboard for dampness, as this can lead to corrosion.

  6. Are you constantly adding coolant? If a vehicle requires more and more coolant, it may have a leaky heater core.

Need more help? We know that performing and completing repairs is vital to keeping your trucks on the road and your business moving forward. To learn more about our UPTIME process for Service appointments, click herehttps://www.visiontruckgroup.com/service

 

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