Refrigeration & Air Conditioning Mechanic Red Seal · Question
When troubleshooting an inefficient evaporator with ice buildup, what is a common initial step to diagnose the issue?
A dirty air filter restricts airflow over the evaporator, leading to reduced heat transfer and potential ice formation. Cleaning it is a basic diagnostic step.
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Question: When troubleshooting an inefficient evaporator with ice buildup, what is a common initial step to diagnose the issue?
Answer options:
- Add more refrigerant to the system ✅ Inspect and clean the air filter
- Replace the compressor immediately
- Adjust the condenser fan speed
Correct answer: Inspect and clean the air filter
Explanation: A dirty air filter restricts airflow over the evaporator, leading to reduced heat transfer and potential ice formation. Cleaning it is a basic diagnostic step.
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Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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