Tankless Water Heater Maintenance Checklist

Use this Tankless Water Heater Maintenance Checklist to perform routine inspections, flush systems, and check components to ensure long-term operation.

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Property Inspection
Tankless Water Heater Maintenance Checklist

Visual Inspection

System Operation & Performance

Water Filter & Inlet Screen

Descaling & Flushing

Gas Line & Combustion Inspection

Electrical Connections & Controls

Drainage & Condensate System (if Applicable)

Documentation & Service Records

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Checklist by GoAudits.com – Please note that this checklist is intended as an example. We do not guarantee compliance with the laws applicable to your territory or industry. You should seek professional advice to determine how this checklist should be adapted to your workplace or jurisdiction.

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Tankless Water Heater Maintenance Checklist

Use this Tankless Water Heater Maintenance Checklist to perform routine inspections, flush systems, and check components to ensure long-term operation.

1. Is the exterior of the unit free from dust, corrosion, or physical damage?

2. Are the water and gas pipes securely connected and leak-free?

3. Is there any sign of water staining or rust near the unit or on nearby walls?

4. Is the venting system intact and free of obstructions?

1. Is the water temperature consistent with the unit's setpoint?

2. Is the unit igniting and shutting off correctly during use?

3. Are there any unusual noises during operation (e.g., clicking, hissing, knocking)?

4. Does the display panel show any error codes or alerts?

1. Has the inlet water filter or screen been cleaned or replaced recently?

2. Is there any sediment buildup visible in the filter?

3. Is water flow normal after cleaning the inlet screen?

1. Has the unit been flushed to remove mineral buildup within the past 6–12 months?

2. Was a manufacturer-recommended descaling solution used during flushing?

3. Were both hot and cold isolation valves opened and flushed properly?

4. Was the system fully purged of air after descaling?

1. Is the gas shutoff valve functioning properly and free of leaks?

2. Has a licensed technician inspected the gas combustion chamber if required?

3. Are carbon monoxide detectors functioning in the area near the unit?

1. Are all electrical wires securely connected and free from fraying or burns?

2. Has the control panel been checked for responsive buttons and display accuracy?

3. Was the unit power-cycled after maintenance to ensure proper reset?

1. Is the condensate drain line unclogged and draining correctly?

2. Are there any signs of pooling water or backflow near the drain outlet?

3. Is the neutralizer (if present) in good condition and not depleted?

1. Has the maintenance log been updated with the date, actions taken, and observations?

2. Were any issues or repairs documented and communicated to the property owner or manager?

3. Has the manufacturer’s maintenance guideline been followed for this model?