Pool Heater Inspection: Gas, Heat Pump and Solar Checks
What a pool heater inspection covers in a California home inspection: the noninvasive visual and operational checks on gas, heat pump and solar heaters, what is out of scope, and how the heater is recorded as equipment condition rather than a safety feature.
A California pool heater inspection is a noninvasive visual and operational check. Business and Professions Code §7195(a)(1) defines a home inspection as a noninvasive physical examination, so the inspector runs the heater, looks for leaks, corrosion, soot and damaged venting, and records what was seen. A heater is not one of the seven drowning prevention features in HSC §115922; it is recorded as equipment condition alongside the pump and filter.
This guide sets out what that means for gas heaters, heat pumps and solar systems: the checks that belong in a noninvasive inspection, the ones that belong to a licensed contractor, how Title 24 enters the picture on permitted work, and how to write the heater finding so it stays separate from the safety feature count.
Where the heater sits in a California pool inspection
The two California pool statutes describe different things. HSC §115922 lists seven drowning prevention safety features and requires two of them when a building permit is issued for a new or remodeled pool or spa at a single-family home. BPC §7195 requires the home inspection report at a property transfer to identify which of those seven features the pool has. Neither section mentions the heater. The heater is inspected because a home inspection covers the mechanical systems of the property, not because a pool statute asks for it.
That distinction shapes the report. PoolVerify's California template lists the HSC §115922 features first and then a set of additional categories: pool equipment (pump, filter, heater, chlorinator, automation system), pool structure, plumbing, electrical and safety. The heater finding goes in the equipment category, so the compliance summary on page 1 counts safety features only and a heater that fails to fire never reads as a missing drowning prevention feature.
The additional items section of a PoolVerify inspection, with equipment, electrical, and deck conditions.
The "noninvasive" limit in BPC §7195(a)(1) draws the line between what an inspector records and what a licensed contractor tests.
In a noninvasive heater inspection
Out of scope, refer to a licensed contractor
Run the heater from the control and confirm it fires or starts
Gas pressure readings with a manometer
Look at the cabinet, clearances, venting and termination
Combustion analysis or carbon monoxide measurement
Look at visible gas piping, unions and fittings for corrosion and damage
Leak testing of gas connections
Open access panels the manufacturer designed to be opened and look for soot, rust and water
Removing burners, the heat exchanger or the control board
Look at refrigerant lines for oil stains and at the coil for debris and damage
Checking or adding refrigerant charge
Press the GFCI test button where the equipment is GFCI protected
Voltage or amperage measurements at the unit
Read the nameplate and photograph it
Determining Title 24 or building code compliance
The limitation statement in a BPC §7195 report says the same thing for the safety features: the inspection does not determine whether features meet ASTM standards or local building codes, and a licensed contractor should verify compliance. The heater finding follows the same rule.
Gas pool heater checks
Gas heaters carry the two hazards a visual inspection is most likely to catch: combustion products where they should not be, and gas where it should not be. The sequence below takes a few minutes at the equipment pad.
Gas heater checks at the equipment pad: heat exchanger leaks and scale, flow at the pressure switch, blue flames, no CO.
Smell first. A gas smell at the pad ends the heater check. Note it, do not operate the heater, and recommend the gas supplier or a licensed contractor before use.
Cabinet and clearances. Rust through the cabinet, a missing panel, vegetation or stored items against the unit, and combustible material near the vent are all findings. Manufacturer clearances are on the label; the inspector notes what is around the unit rather than measuring to a code figure.
Venting. Look at the flue or vent from the heater to its termination: sections disconnected, crushed, rusted through, or terminating under an eave, next to a window or into an enclosed space.
Gas piping. Follow the visible pipe from the shut-off to the heater. Corroded fittings, a flexible connector run inside the cabinet, or a missing shut-off valve are observations for the report.
Fire the heater. Call for heat at the control. Note whether ignition occurs, whether the burner stays lit, and the flame colour where the front panel gives a view: steady blue is expected, lazy yellow or orange flame and soot on the chamber walls are observations that point to incomplete combustion and a contractor referral.
Heat exchanger area. With the panel open, look for water dripping, rust streaks, white mineral deposits and scale. Listen for banging or popping once the heater is running.
Pressure relief valve. Confirm one is fitted and that its discharge is not capped. Whether to lift the lever is an owner decision; lifting a corroded valve can start a leak.
Controls. Read the set point against the pool thermometer if one is fitted, and confirm the heater cycles off when the pump is off if the system is designed that way.
Every observation gets a photo. The nameplate photo, with model and serial, goes on the same item so the report identifies the unit.
Heat pump pool heater checks
A heat pump moves heat from the air into the water with a refrigerant circuit, so there is no combustion to inspect. The visual check is about airflow, the refrigerant circuit's visible parts, and the electrical connection.
Airflow. The unit needs free air on its intake sides and above the fan. Fences, storage, shrubs and a cover set on top of the unit are findings.
Evaporator coil. Look for leaves and debris in the fins, bent or crushed fins, and corrosion, which is common near the coast.
Refrigerant lines. Oil staining at joints or on the ground under the unit suggests a refrigerant leak. Note it; the charge itself is contractor work.
Fan and compressor. Call for heat. The fan should start and the compressor should run without grinding, rattling or repeated stopping and starting.
Electrical. Locate the disconnect, confirm it is within sight of the unit and labelled, look at visible conduit and wiring for damage, and press the GFCI test button where the circuit is GFCI protected. Voltage checks are out of scope.
Condensate. Heat pumps produce condensate in normal operation; water under the unit is not a leak on its own. Water inside the cabinet or from a plumbing joint is.
The electrical side of the pad, including bonding and GFCI protection for the whole equipment set, is covered in the pool electrical inspection guide.
Solar pool heater checks
Solar systems are the simplest to inspect visually and the hardest to see, because most of the system is on a roof. Where the inspector can see the collectors safely from a ladder or the ground, the checks are:
Collectors. Cracks, holes, UV chalking, sagging panels and loose or missing mounting hardware.
Roof penetrations. Piping through the roof should be flashed and sealed. Staining at a penetration is a roofing finding as much as a pool finding.
Piping. Exposed pipe for cracks, UV damage and leaks; supply and return lines should be supported.
Valves and controller. With the pump running, operate the diverter valve or let the controller call for heat and confirm water is sent to the roof and returns warmer. Note whether the controller has a sensor on the roof and one in the return line.
Isolation and drain-down. Where the system has a drain-down or isolation valve, note its position and whether it is labelled.
Collector area, flow rate and sizing are design questions for the installer, not inspection findings.
One row per item, a photo on each. PoolVerify's equipment category gives the heater its own row with condition, notes and up to 10 photos, and the compliance summary counts HSC §115922 features only, so a heater finding never changes the safety result. See the checklist.
Title 24 and new or replaced heaters
The California Energy Commission publishes the Building Energy Efficiency Standards, Title 24, Part 6 of the California Code of Regulations, and the 2025 standards took effect on January 1, 2026. Those standards include requirements for pool and spa heating equipment on permitted work, and the building department that issues the permit enforces them.
For an inspector the practical rule is the same as for any code question. Record the heater type (gas, heat pump, solar), the nameplate data and the installation date if the owner has it, and note whether a permit was pulled for a recent installation where that information is offered. Do not write that a heater does or does not comply with Title 24; that is a determination for the building official, and the report's limitation statement says so. An owner or agent who asks what the current standards require for a new heater should be pointed to the Energy Commission's published standards and their building department.
Writing the heater finding
A heater finding needs four parts: what the heater is, what was observed, what it means, and what to do next.
Identification. "Gas heater, [make and model from nameplate], serial photographed."
Observation. "Heater fired when heat was called; flame steady blue; no soot in the chamber; rust staining at the base of the heat exchanger housing; vent intact and terminating above the roof line."
Condition. Use the template's condition scale consistently across equipment items so a reader can compare the heater with the pump and filter.
Recommendation. "Recommend evaluation of the heat exchanger by a licensed pool or heating contractor." Where nothing was found, say so: "No deficiencies observed at the time of inspection."
A heater that did not run is written the same way: "Heater did not fire when heat was called. No visible leaks or corrosion. Recommend evaluation by a licensed contractor." It is an equipment observation, not a safety feature failure, and the report keeps it in the equipment section. How the rest of the report is structured is in our pool inspection report guide.
Pool heater inspection checklist
All heater types
Nameplate photographed: make, model, serial
Heater runs when heat is called from the control
Cabinet intact, clearances free of storage and vegetation
No visible leaks at unions, valves or the heater's water connections
Disconnect or shut-off present and accessible
Condition recorded and photographed
Gas heaters
No gas smell at the pad
Visible gas piping and fittings free of corrosion and damage; shut-off valve present
Vent continuous, intact and terminating in open air
Flame steady blue; no soot in the combustion chamber
No water, rust streaks or scale at the heat exchanger
Pressure relief valve fitted, discharge not capped
Heat pumps
Air intake and fan discharge unobstructed
Coil fins free of debris and damage; corrosion noted
No oil staining on refrigerant lines
Fan and compressor start and run without unusual noise
GFCI test button trips the circuit where fitted
Solar systems
Collectors intact and secured
Roof penetrations flashed and sealed
Exposed piping supported and free of leaks
Diverter valve or controller sends water to the collectors when heat is called
Isolation or drain-down valve position noted
Limitations
This guide is general information, not legal advice or a substitute for a licensed contractor's evaluation. The current text of BPC §7195 and HSC §115922 on leginfo.legislature.ca.gov controls, the manufacturer's installation instructions control the clearances and service procedure for a given heater, and the building department that issues a permit applies the energy and building codes. PoolVerify is inspection software for California residential pool safety inspections; it does not perform inspections, certify inspectors, or issue compliance certificates.
Frequently asked questions
Is a pool heater part of a California pool safety inspection?
Yes, as equipment condition, not as a safety feature. A heater is not one of the seven drowning prevention features in HSC §115922(a), so it does not count toward the two features a permit requires or the feature statement in a BPC §7195 report. Inspectors record the heater under equipment, with the pump, filter, chlorinator and automation, and note what they saw and whether it ran.
What does a home inspector check on a gas pool heater?
The visible and operational items: the cabinet and its clearances, the venting and its termination, the visible gas piping and fittings, the burner flame colour with the front panel open where the manufacturer allows, soot inside the cabinet, water or rust at the heat exchanger, the pressure relief valve, and whether the heater fires when the thermostat calls for heat. Anything that smells of gas is a stop and a referral.
Does the inspector test gas pressure or combustion?
No. BPC §7195(a)(1) defines a home inspection as a noninvasive physical examination, so it does not include gas pressure readings, combustion analysis, refrigerant work or disassembly beyond the access panels. Those tests belong to a licensed contractor. The inspection report records what was observed and recommends further evaluation where an observation warrants it.
What does a heat pump pool heater inspection cover?
The cabinet and airflow around it, the evaporator coil and fan for debris, damage or corrosion, the refrigerant lines for oil stains, the disconnect and visible wiring, the GFCI test button where the unit is GFCI protected, and whether the compressor and fan start and run without unusual noise when heat is called. Refrigerant charge and electrical measurements are outside a noninvasive inspection.
Does a pool heater have to meet California Title 24?
Title 24, Part 6 of the California Code of Regulations, the Building Energy Efficiency Standards published by the California Energy Commission, sets requirements for pool and spa heating equipment on permitted work, and the building department that issues the permit enforces them. A home inspection records the heater's type and nameplate data; it does not determine code compliance.
What should the report say about a heater that does not run?
State the observation and the condition, and recommend evaluation by a licensed contractor. For example: heater did not fire when heat was called; no visible leaks or corrosion; recommend evaluation by a licensed pool or heating contractor. The heater does not affect the count of HSC §115922 safety features, so the finding sits in the equipment section of the report, not the compliance summary.
Conclusion
A pool heater inspection is a short, disciplined visual check: identify the unit, run it, look at the vent, the gas line, the flame and the heat exchanger area on a gas heater, the coil, fan and refrigerant lines on a heat pump, the collectors and roof penetrations on a solar system, and write down what was seen with a photo of each item. Measurements and code determinations go to a licensed contractor and the building department. The heater never changes the safety feature count.
PoolVerify gives the heater its own row in the equipment section of the California checklist, with condition, notes and photos, and generates the PDF report on-site. Start your 14-day free trial, no credit card to start.
A branded PDF with the compliance summary, the feature table, each finding with its photos, and the signature, generated on‑site when the BPC §7195 and HSC §115922 checklist is complete.
