Mazda TC070-15-01H, Student Manual

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AIR CONDITIONING
02 - Locating A/C Protection Devices
Activity02-1
TC070-15-01H
Technician Name
LOCATING A/C PROTECTION DEVICES
Purpose:
In this activity, you will locate A/C protection devices and explain how they
operate.
What you will need to complete this activity:
Current model vehicle
Workshop Manual or Body Electrical Trouble Shooting Manual
Protection Devices react to abnormally high or low pressure and excessively high
temperature which would damage the system.
Refrigerant Pressure Switch
1. Where is the pressure switch located?
2. How does it protect a system that has a leak in the condenser?
3. How does it protect a system that has inoperative condenser fans?
4. Is the refrigerant that contacts the switch a liquid or vapor?
Thermal Protector (Thermal Switch)
1. Where is this device located?
2. This component senses the temperature of liquid or vapor refrigerant?
3. In what way does the thermal protector safeguard the system?
4. If this component fails due to an open circuit, what will the customer notice?
NOTE
In some models, the Thermal Protector is called “Thermal Protector “ and “Thermo-
switch.” When ordering parts, use the term “Thermal Protector Kit.”