If you're experiencing hot air blowing into the cabin of your 1998 Ford Ranger despite the AC being on and the low-pressure tubes under the hood being cold, it could indicate a problem with the temperature control system. Here are a few possible causes to consider:
Temperature blend door: The temperature blend door is responsible for controlling the mix of hot and cold air entering the cabin. If the door is stuck in the hot air position, it would explain why only hot air is blowing. It's possible that the blend door actuator or the door itself may be faulty and require replacement.
Heater control valve: The heater control valve regulates the flow of hot coolant to the heater core, which in turn affects the temperature of the air blowing into the cabin. If the valve is stuck open or malfunctioning, it could result in hot air being directed into the cabin regardless of the temperature settings.
Control module or switch: The control module or switch that governs the temperature settings in the cabin could be malfunctioning. This could prevent the system from responding properly to changes in temperature adjustment, resulting in hot air being blown.
Given the age of your vehicle, it's possible that some components within the temperature control system may have worn out or failed over time. I would recommend consulting a qualified mechanic or an automotive HVAC specialist to diagnose and address the issue. They will be able to perform a thorough inspection, identify the specific cause of the problem, and recommend appropriate repairs or replacements.
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Wednesday, July 23rd, 2014 AT 11:24 AM
