Preventive Maintenance Services
Ontario, CA
The Inland Empire's distribution epicenter. Amazon, UPS, FedEx — and hundreds of 3PLs feeding them. Direct Source provides scheduled PM visits for warehousing and distribution facilities in Ontario — written reports every visit, a technician who knows your equipment, and direct contact between visits. Not a call center.
Request a PM Quote
Same-day response. Tell us what equipment you're running in Ontario — we'll get back to you today.
Trusted by industry leaders
Direct Source serves Southern California’s top manufacturers
What We Do
PM Services We Provide in Ontario
Every visit is documented. Every finding is reported. Here's what's included depending on your equipment scope.
Electrical PM
Panel inspections, thermal imaging, connection checks, breaker testing. We catch electrical issues before they become fires or failures.
Available for all Ontario facility types. NFPA 70E compliant procedures on every visit.
PLC & Controls PM
Controller backups, battery replacement, I/O testing, firmware checks, and signal verification.
We service Allen-Bradley, Siemens, Omron, Mitsubishi, and other major platforms. Full documentation of all changes.
Mechanical PM
Lubrication, alignment, belt and chain inspection, vibration analysis, coupling checks.
We keep rotating equipment running smooth and catch wear patterns before they cause failures in Ontario facilities.
HVAC & Cooling PM
Coil cleaning, refrigerant checks, belt and motor inspection, filter changes.
Inland heat puts extra stress on cooling systems. We maintain them before they fail.
Compressed Air PM
Compressor service, dryer maintenance, leak surveys, filter and belt changes.
Compressed air leaks cost more than most facility managers realize. We find them and fix them.
OEE & Condition Monitoring
Sensor installation, data logging, baseline trending, and condition-based monitoring setup.
We wire and install OEE monitoring systems for Ontario facilities wanting to track machine uptime, performance, and quality.
Why Direct Source
PM That Fits Around Your Operation
Written Reports Every Visit
You get a timestamped report every time: what was checked, what was found, what needs attention. Your maintenance records stay current.
Scheduled Around Your Production
PM visits happen on your calendar. Early morning, evenings, weekends, between shifts — we build the schedule around your operation, not ours.
Same Technician, Every Visit
The tech who services your Ontario facility knows your equipment. Not a rotating crew — a consistent person who notices when something changes.
Direct Contact, Not a Call Center
Between visits you reach your technician directly. A real person who knows your facility — not a dispatcher reading from a script.
Direct Source at a Glance
How It Works
From First Call to Full PM Program
No long sales process, no complicated onboarding. You tell us what you're running in Ontario and we build the program from there.
Call or Submit
Tell us what equipment you run and where in Ontario. We respond same day.
Site Walkthrough
We walk your Ontario facility, document equipment, note condition, and identify PM priorities.
PM Schedule & Scope
You get a custom PM calendar — visit frequency, equipment covered, and scope — built around your production schedule.
Ongoing Service
Regular visits, written reports after every one, and a direct line to your technician. That's the program.
Who We Serve
Industries We Serve in Ontario, CA
Ontario's industrial operations run warehousing, distribution, and more. Different equipment, different demands, different PM requirements. We build the program around what you actually run.
Warehousing
Warehousing operations in Ontario depend on conveyor systems, dock levelers, and electrical infrastructure that needs consistent attention. We build PM programs around your operational windows.
Distribution
Distribution and logistics facilities in Ontario operate conveyor systems, dock equipment, and automated sorting around the clock. We maintain this equipment with minimal disruption to your operation.
Cold storage
Cold storage operations in Ontario run refrigeration systems and controlled-environment equipment around the clock. Equipment failures mean product loss. We prioritize refrigeration PM and respond fast when issues arise.
E-commerce fulfillment
Fulfillment operations in Ontario run automated systems that cannot tolerate downtime. Conveyor PM, sortation maintenance, and electrical system inspection on your schedule.
HVAC & Cooling Systems
Ontario facilities of all types depend on HVAC and cooling equipment. We provide coil cleaning, refrigerant checks, motor inspection, and belt service on your schedule.
Compressed Air Systems
Compressed air leaks and compressor failures cost more than most facilities realize. We audit, maintain, and document your compressed air system as part of any PM program.
What Clients Say
Trusted by Ontario & San Bernardino County Facilities
“We were experiencing electrical and PLC problems at our manufacturing plant and needed help ASAP. Direct Source came in the same day, gave us a very fair estimate, found the problem, and fixed it. We got back up and running with little downtime. These guys know what they're doing.”
“We had an unexpected production issue at our facility and Direct Source responded quickly. Their team diagnosed the problem fast and got us back up and running the same day. Professional and dependable.”
“They were professional and prompt, diagnosed the issue quickly, and fixed it at no charge since it was an easy fix. That type of customer service goes a long way in showing how they operate. They will be our FIRST call for the next electrical need.”
Serving Ontario, CA
Preventive Maintenance Services in Ontario, CA
Ontario's industrial facilities run warehousing and distribution operations across Ontario Airport Industrial, Mission Blvd Logistics Zone, Edison Ave Corridor — equipment that runs hard and can't afford unplanned downtime. These facilities need PM that fits around production schedules, not the other way around.
Direct Source serves Ontario as part of our core San Bernardino County coverage. Our technicians handle electrical PM, PLC and controls maintenance, mechanical inspection, HVAC service, and compressed air systems. We also service nearby Rancho Cucamonga, Pomona, Chino. Zip codes served: 91761, 91762.
Tell Us About Your Facility
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FAQ
Frequently Asked Questions — PM in Ontario
How quickly can you respond to Ontario facilities?
Our shop is in Santa Fe Springs — San Bernardino County is part of our core territory. For PM contract clients, we respond same day or next day for emergency issues. Scheduled visits are set up in advance on your production calendar.
What types of equipment do you maintain in Ontario?
In Ontario, we commonly maintain: conveyor systems, dock levelers, refrigeration units, compressors, forklifts, electrical panels. If you have equipment outside that scope, tell us what you're running and we'll let you know upfront if it fits our program.
How often do you recommend PM visits for warehousing operations?
It depends on equipment age, criticality, and run hours. For most warehousing facilities, we start with quarterly visits and adjust based on what we find. High-cycle equipment often warrants monthly checks. We'll make a specific recommendation after a site walkthrough.
Do we need to stop production for a PM visit?
Rarely. We schedule around your shifts and work on equipment during natural downtime windows. When we need a brief shutdown for specific tasks, we coordinate that in advance — no surprises.
What's included in a PM visit report?
Every visit produces a written report: what was inspected, what was found, measurements logged, parts replaced, and anything flagged for follow-up with our recommendation. The report is yours to keep — it becomes your maintenance history.
Do you handle emergency calls between PM visits?
Yes. PM contract clients get priority scheduling for emergency calls. We cover Ontario and all of San Bernardino County and can typically respond same day or next day.
Stop Reacting. Start Preventing.
A PM program costs a fraction of an emergency repair. Let's build one for your Ontario facility.