Preventive Maintenance

BuildingWrench repair guide

Preventive Maintenance

Pre-Summer Commercial HVAC Checklist for Facility Teams

The best time to discover clogged condensate drains, dirty filters, failed fans, and dead thermostats is before the first hot week. Focus on airflow, drainage, controls, and obvious operation.

Last reviewed 2026-09-12 · General facility-maintenance information, not a substitute for site procedures, manufacturer instructions, codes, or qualified professional judgment.

Routine PMSkill: Beginner-friendlyFormat: Diagnose → Fix → Test
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Safety boundary

Routine PM does not replace code-required inspections, manufacturer maintenance, or licensed/certified service.

Full troubleshooting steps are in Pro

The safety boundary, quick answer and stop-work conditions above stay free. Pro opens the likely causes, symptom table, step-by-step procedure and preventive maintenance for this guide.

Stop and call a licensed professional when

  • Refrigerant or electrical repairs are needed
  • Roof access is unsafe
  • Repeated faults occur
  • Critical cooling is affected

Mistakes, FAQ, parts and tools

Pro opens the rest of this guide: common mistakes, field FAQ, the parts list, and the tools for the job.

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Preventive Maintenance

Commercial HVAC Filter Change Schedule: Stop Guessing and Use Condition

There is no universal 'change every 90 days' rule for commercial HVAC filters. Occupancy, construction dust, filter efficiency, outdoor-air load, runtime, and system design all matter. Build your interval from inspection history and pressure-drop data where available.

Preventive Maintenance

Monthly Commercial Restroom Inspection Checklist

Restrooms generate a constant stream of small maintenance problems. A monthly inspection of flushometers, faucets, drains, partitions, accessories, caulk, exhaust, lighting, and hidden leaks catches water waste and user complaints before they become emergencies.

Preventive Maintenance

Monthly Commercial Roof Walk Checklist

A roof walk is about finding changes: blocked drains, loose debris, membrane damage, open flashings, standing water, and equipment-service damage. Use the same route and photos each time.

Preventive Maintenance

Quarterly Commercial Door Inspection Checklist

Doors fail gradually through loose hinges, leaking closers, latch misalignment, damaged panic hardware, and worn seals. A short quarterly inspection catches these before they become security or life-safety problems.