Title: Identify the cause of system failures resulting in refrigerant loss from the A/C system high pressure relief device.
Course: Diesel Equipment Technology III (20107-III) > Section: Heating, Ventilation, and Air Conditioning: Servicing the Evaporator, Condenser, and Related Components

Identification should include the following possible causes:

- Plugging moisture in the system
- Fan is not operational
- Restricted air flow

Process/Skill Questions:

- Why would a non-operational cooling fan cause the valve to release?
- Why is moving air so important in an air conditioning system?