Diagnose commercial HVAC and refrigeration systems across Los Angeles and the San Fernando Valley while dispatching from home. Use electrical and mechanical troubleshooting skills daily.
All Temperatures Controlled, Inc. seeks experienced Commercial HVAC/R Service Technicians for full time service work. Since 1978, the company has supported commercial HVAC, refrigeration, and industrial mechanical systems. This position focuses on diagnosing, repairing, installing, and maintaining customer equipment throughout the service area.
Key Responsibilities: Diagnose and repair commercial HVAC and refrigeration equipment
Perform preventive maintenance and equipment inspections
Troubleshoot electrical, mechanical, and refrigeration issues




Document service work and communicate repair options
Participate in rotating on-call service coverage
Requirements: Three or more years commercial HVAC/R service experience
Commercial refrigeration troubleshooting and repair experience
EPA Certification and valid driver's license
Clean driving record and basic HVAC/R tools
Ability to work overtime and on-call rotations
Apply commercial HVAC/R troubleshooting, repair, and maintenance expertise while serving customer job sites throughout the Los Angeles area.

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📌 Commercial HVAC Refrigeration Service Technician (Ontario)
🏢 All Temperatures Controlled
📍 Ontario