Recruiter's Glossary

Examples: R-22 • SEER (Seasonal Energy Efficiency Ratio) • Blower Motor

Crankcase Heater

Term from Air Conditioning Services industry explained for recruiters

A Crankcase Heater is an important part of air conditioning and refrigeration systems that keeps the system's oil warm when it's not running. Think of it like a small electric blanket that wraps around part of the AC unit. This helps prevent damage and ensures the system starts up properly, especially in cold weather. When looking at resumes, you'll often see this term mentioned because installing, replacing, or maintaining these heaters is a common task for HVAC technicians. It's similar to other preventive maintenance components like filter systems or thermostats - they're all parts that need regular attention to keep the whole system running well.

Examples in Resumes

Installed and replaced Crankcase Heater|Crankcase Heaters in commercial AC units

Performed troubleshooting and maintenance of Crankcase Heater systems in industrial refrigeration units

Led team training on proper Crankcase Heater installation and maintenance procedures

Typical job title: "HVAC Technicians"

Also try searching for:

HVAC Service Technician Air Conditioning Technician Refrigeration Technician HVAC Maintenance Technician Commercial HVAC Tech AC Repair Specialist

Where to Find HVAC Technicians

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Job Resources

Example Interview Questions

Senior Level Questions

Q: How do you determine if a crankcase heater needs replacement and what factors do you consider when selecting a new one?

Expected Answer: A senior technician should explain checking for proper resistance readings, visual inspection for damage, and mentioning factors like voltage requirements, wattage, and physical dimensions. They should also discuss the importance of matching the heater to the specific compressor model.

Q: How would you train junior technicians on crankcase heater installation and maintenance?

Expected Answer: Should discuss creating a systematic approach to teaching safety procedures, proper installation techniques, common troubleshooting methods, and the importance of regular maintenance checks.

Mid Level Questions

Q: What problems can occur if a crankcase heater fails?

Expected Answer: Should explain how failed heaters can lead to compressor damage, oil mixing with refrigerant, and system failures, especially during cold starts. Should mention warning signs and preventive measures.

Q: Explain the process of installing a new crankcase heater.

Expected Answer: Should describe safety procedures, proper mounting techniques, electrical connections, and testing procedures to ensure proper operation after installation.

Junior Level Questions

Q: What is the purpose of a crankcase heater?

Expected Answer: Should explain that it keeps the compressor oil warm when the system is off to prevent refrigerant from mixing with the oil and causing damage on startup.

Q: What basic safety measures do you take when working with crankcase heaters?

Expected Answer: Should mention disconnecting power, using proper tools, checking voltage requirements, and following manufacturer guidelines for installation.