my Ford Explorer makes a popping noise when I turn on the heater, what could it be?

Solution

1. Preparation

• Tools Required: Socket set, screwdriver set, flashlight
• Disconnect the negative battery terminal to ensure safety during inspection.

2. Inspect Cabin Air Filter

• Locate the cabin air filter access panel (usually under the glove compartment).
• Remove the filter and check for dirt, debris, or damage.
• If dirty: Replace with a new cabin air filter.

3. Check Blower Motor and Ductwork

• Remove the blower motor assembly (typically accessed from under the dashboard).
• Inspect for foreign objects that may be causing the popping noise.
• Clean the blower motor and surrounding ductwork if necessary.

4. Examine Heater Core

• Locate the heater core hoses in the engine bay.
• Check for leaks or signs of corrosion around the heater core.
• If leaks are found, the heater core must be replaced.

5. Reassemble and Test

• Reinstall the blower motor and cabin air filter.
• Reconnect the battery terminal.
• Start the vehicle and turn on the heater to verify if the noise persists.