Rooftop Units & Air Handlers — Install, Repair & Maintenance
Rapid-response diagnostics, repair, and maintenance for rooftop units (RTU) and air handlers (AHU) across LA & Ventura.
When to Call Us
RTUs
- short cycling, poor airflow, heat not keeping up
- economizer faults, dampers not responding
- gas manifold out of spec, ignition or limit trips
- failed blowers/motors, belt/bearing issues
- controls/zoning faults
Chillers & Central Plants
If your building also relies on chillers or a central plant, we can coordinate rooftop and chilled-water service so the entire system works together — from air handlers and rooftop units to pumps, cooling towers, and chiller controls.
Equipment & Brands We Service
York, Trane, Carrier, Lennox, Daikin, LG, Mitsubishi, Aaon, McQuay/Daikin Applied, Liebert/Vertiv, Dunham-Bush and more.
How We Work (3 Steps)
Diagnosis & Data
Airflow/capacity checks, temps/pressures (SH/SC), combustion set-up, ΔT/ΔP trending. We isolate root cause before parts are ordered.
Action Plan
Root cause, parts list, risk/impact, quote and timelines—so you can choose the right option.
Report & Handover
Before/after readings, photos, settings handover, and a maintenance plan to keep uptime stable.
RTU & AHU Service Options
Emergency Diagnostic (1-visit)
Same/next-day response, full fault isolation with live data and written next steps.
RTU Heat Tune & Safety Check
Combustion check, gas manifold adjustment, airflow/fan speed optimization, limit/safety verification, report with readings.
Diagnostics & PM
ΔT tracking, pump/flow verification, sensor validation, HX cleaning plan, water treatment coordination, seasonal start-up/shutdown.
Case Snapshot
Before: 50-ton RTU heat not keeping up; supply/return spread unstable.
Actions: Raised fan to High; adjusted gas manifold to 3.5″ w.c.; verified economizer position; confirmed belts/bearings; logged temps.
After: Stable heat; ΔT normalized ; no limit trips; improved comfort.
