The Importance of Commercial HVAC Heating Planned Maintenance

caledonian.mechanical • March 14, 2025

At Caledonian Mechanical Inc., we take pride in delivering comprehensive planned

HVAC maintenance to ensure that commercial heating systems operate at their peak

efficiency. A properly maintained heating system not only ensures optimal comfort for

your building but also reduces energy consumption, lowers repair costs, and

extends equipment lifespan.

Our Planned Maintenance (PM) Program includes two heating and two cooling

checks annually, ensuring year-round system reliability. Each service visit involves

detailed inspections, testing, cleaning, and documentation to identify and prevent

potential issues before they lead to costly breakdowns.

After each maintenance visit, our customers receive a digital checklist report with

photos of any discovered issues, along with a clear breakdown of recommended repairs

or solutions.

Step-by-Step Breakdown of Our Heating Planned Maintenance

Each heating maintenance visit includes critical tests, inspections, and

adjustments to keep your system running efficiently.

1. Heat Exchanger & Combustion Analysis

Measure and record the temperature rise across the heat exchanger to confirm

proper heat transfer.

Conduct a combustion analysis to ensure there are no cracks or corrosion in

the heat exchanger, preventing potential carbon monoxide leaks.

2. Static Pressure & Airflow Testing

Measure and record static pressure differentials to verify the system is operating

within manufacturer specifications.

Ensure proper airflow distribution to maximize efficiency and prevent

overheating.

3. Gas System Testing & Calibration

Inspect, test, and record:

• Burners and flame sensor for cleanliness and function.

• Gas valve manifold pressure to confirm proper gas flow.

• Inlet gas pressure from the building supply to prevent excessive fuel

consumption or underheating.

Adjust gas flow to maintain proper combustion efficiency.

4. Blower Motor & Fan Belt Inspection

Inspect and record blower motor voltage and current readings to detect early

signs of failure.

Check and replace fan belts, ensuring correct tension and torque calibration.

5. Economizer Testing & Fresh Air Intake Inspection

Test fresh air economizer functionality, verifying operation from 10% to 100%

fresh air demand.

Inspect and clean economizer steel filters to maintain indoor air quality and

efficiency.

6. Electrical Safety & Component Testing

Inspect electrical connections for overheating, dark marks, or loose terminals.

Measure voltage and current readings for all major electrical components:

• Blower motor

• Inducer motor

• Other components involved in the heating cycle

Test and record run and start capacitors to ensure proper electrical

efficiency.

7. Ignition System & Safety Controls Testing

Ohm out hot surface ignition or spark ignition to confirm proper function.

Test pressure switches and high-temperature safety switches to ensure they

properly shut down the unit if overheating occurs.

8. Air Filter Replacement & Ductwork Inspection

Replace air filters and clean fresh air economizer filters.

Conduct a ductwork inspection to check for leaks, poor insulation, or blockages

affecting efficiency.

9. Thermostat & Sensor Calibration

Verify proper thermostat and sensor calibration for accurate temperature control.

Test the functionality of all climate control sensors.

10. Unit Labeling & Documentation for Future Service

Label each rooftop unit (RTU) with its location and unit number for easy

identification in future maintenance or repairs.

Provide a detailed digital report to the customer, including:

• Inspection findings

• Photos of any issues

• Breakdown of recommended repairs or upgrades

• Efficiency improvement recommendations

Why Regular Heating Maintenance Matters

Lower Energy Costs – A properly tuned system minimizes excessive gas and

electricity consumption.

Prolonged Equipment Lifespan – Preventing wear and tear extends the life of

your RTUs.

Fewer Emergency Repairs – Early issue detection reduces the risk of

expensive no-heat service calls.

Improved Safety – Prevents risks such as gas leaks, carbon monoxide

exposure, and overheating.

Optimized Comfort – Ensures consistent and reliable heating throughout your

facility.

By investing in a planned maintenance program, you significantly reduce the risk of

unexpected system failures, keeping your business operations running smoothly while

maintaining a comfortable indoor environment.


Contact Caledonian Mechanical Inc. today to schedule your commercial HVAC

heating maintenance!


Visit www.caledonianhvac.com for more details.


Caledonian Mechanical Inc. – Your Trusted HVAC Partner!


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