Features
- Overview
  Features
Solution
- By Industry
  Integration
Resources
- Community
  Learn
  - Resource Center
  - Blogs
  - Checklists
  - Case Study
  - Articles
  - Use Cases Documents
  - Support
  - FAQ's
  Popular
Pricing

signup
Login

Signup

cooling-tower-maintenance-checklist-guide

Cooling Tower Maintenance Checklist: Complete PM Guide

A cooling tower runs hot, wet and non-stop, so small problems stay hidden until they are expensive: scale on the fill, a gearbox running low on oil, water chemistry slowly drifting, a chiller burning extra power to compensate. A tower that is checked on a fixed routine avoids most of this, and a documented routine is also what standards like ASHRAE 188 expect. Below is a 35-point cooling tower maintenance checklist you can use as it is. OxMaint AI maintenance management software turns every line into a scheduled task with a signed, dated record.

Cooling Towers · PM Checklist · Inspection Log · 2026

Cooling Tower Maintenance Checklist: Complete PM Guide

Six zones, 35 checks, five frequencies. Tick each item on your walk-down, from water quality and fill to fans, motors and pumps, then let OxMaint AI schedule the next round and keep the record.

Start Free Trial Today Book a 30 Minutes Demo

checks across six inspection zones

frequencies: daily to seasonal

25–45°C

peak Legionella growth range (CDC)

ASHRAE 188

expects documented water management

How to Use This Checklist

Each line carries a frequency tag. Critical marks items tied to safety or water-health risk, so never skip them. Intervals are typical; your manufacturer's manual and local rules take priority. Book a demo to see these tags become automatic schedules.

DailyWeeklyMonthlyQuarterlySeasonalEvery job

The Cooling Tower Inspection Checklist

1Water Quality & Treatment6 checks

Conductivity and cycles of concentration within targetWeekly
pH within your treatment program rangeWeekly
Biocide residual verified and dosing loggedCriticalWeekly
Bleed-off valve and chemical feed pumps workingWeekly
Microbiological testing done as per your water management planCriticalQuarterly
Water treatment vendor report reviewed and actionedMonthly

2Fill, Drift Eliminators & Nozzles6 checks

Fill free of scale, algae and debrisMonthly
Fill not sagging, broken or collapsedQuarterly
Drift eliminators intact and correctly seatedCriticalQuarterly
Spray nozzles clear, with even water distributionMonthly
Air inlet louvers and screens clearMonthly
Basin and suction strainers cleanedMonthly

3Fans, Gearbox & Drive7 checks

Walk-around: listen for noise, vibration and leaksDaily
Blade condition, pitch and tip clearanceQuarterly
Fan hardware and mounting bolts tightMonthly
Gearbox oil level correct, no leaksMonthly
Gearbox oil changed per manufacturerSeasonal
Drive shaft, couplings or belts inspectedMonthly
Vibration cutout switch testedCriticalQuarterly

4Motors & Electrical5 checks

Motor temperature and amp draw within nameplateWeekly
Bearings lubricated per manufacturerQuarterly
Terminals tight; VFD and panel alarms reviewedQuarterly
Motor insulation resistance testedSeasonal
Lockout/tagout points identified and readyCriticalMonthly

5Pumps, Piping & Make-Up5 checks

Basin level normal; make-up float valve workingDaily
Pump seals and flanges free of leaksWeekly
Pump pressure and flow readings loggedWeekly
Isolation and check valves operate freelyQuarterly
Overflow and drain lines clearMonthly

6Basin, Structure & Safety6 checks

Basin checked for sludge, silt and biofilmMonthly
Basin drained, cleaned and disinfectedCriticalSeasonal
Casing, frame and fasteners checked for corrosionQuarterly
Ladders, handrails and access doors safeCriticalQuarterly
Confined-space and chemical-handling rules followedCriticalEvery job
Checklist signed off and loggedMonthly

Paper checklists get lost and readings get skipped. Start free and run all 35 checks from a phone in OxMaint AI.

Last Month's Checklist: Can You Prove It Was Done?

When an auditor, insurer or manager asks, a photo of a clipboard is not a record. OxMaint AI assigns each task, captures readings and photos, timestamps the sign-off and flags anything overdue, so the log builds itself.

Start Free Trial Book a Demo

Seasonal Start-Up and Shutdown Checklist

Towers need extra care when they start up after idle time or go into layup. Treat these as one-off work orders. Start free and schedule them once a year.

▲Spring Start-Up

Clean and disinfect basin and system before filling
Check fan, gearbox oil, motor and rotation
Inspect fill, nozzles and drift eliminators
Restart water treatment and confirm residuals
Test controls, float valve and vibration switch

▼Winter Shutdown / Layup

Drain basin, piping and exposed lines where freezing is possible
Clean basin and remove debris
Lock out fan and pump power
Service gearbox and lubricate bearings
Record condition and open repair work orders

Red Flags: Fix These First

White crust on fill

Scaling. Check cycles, bleed rate and inhibitor feed.

Rust or red-brown water

Corrosion. Review pH, inhibitor and casing condition.

Slime or odour

Biofouling. Verify biocide and clean the basin.

New vibration or noise

Check blades, bearings and gearbox. Shut down if severe.

How OxMaint AI Runs Your Cooling Tower PM

Recurring Schedules

Daily to seasonal tasks raised automatically.

Mobile Checklists

Tick items, log readings, attach photos on the tower.

Failed Check → Work Order

Any "no" becomes an assigned repair.

Water Reading Trends

Conductivity, pH and residuals tracked per tower.

Overdue Alerts

Supervisors notified before tasks lapse.

Audit-Ready Log

Signed, dated records exported on demand.

Frequently Asked Questions

What should a cooling tower maintenance checklist include?

Water treatment, fill and drift eliminators, fans and gearbox, motors, pumps and piping, and the basin and structure, each with a frequency. Start free and use the template.

How often should a cooling tower be inspected?

A quick walk-around daily, water checks weekly, mechanical checks monthly, and deeper reviews each quarter and season, subject to the manufacturer's manual. Book a demo of the schedule.

How often should a cooling tower be cleaned?

Many sites clean the basin at least once or twice a year, more often in dusty or high-fouling conditions. Your water management plan sets the rule. Start free and schedule it.

Does ASHRAE 188 require records?

It expects a documented water management program, with monitoring and corrective actions on record, for buildings with higher Legionella risk. Check which rules apply to your site. Book a demo of the audit log.

How does a CMMS help with cooling tower maintenance?

OxMaint AI schedules each task, captures readings, turns failed checks into work orders and keeps the full log. Start free and see it work.