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Nicole SmithAug 16, 2025
What to do if my Hayward Heater shows 'Ignition Failure'?
- WWilliam RobinsonAug 17, 2025
If your Hayward Heater is experiencing ignition failure, you should inspect the ignition system for faults.
To Next PageTo Next PageWhat to do if my Hayward Heater shows 'Ignition Failure'?
If your Hayward Heater is experiencing ignition failure, you should inspect the ignition system for faults.
What to do if my Hayward Heater displays a 'Communication Error Between Control Module and Display Interface Assembly'?
If your Hayward Heater shows a communication error between the control module and the display interface assembly, verify the connections between these components.
What to do if my Hayward Heater displays 'Temperature Sensor (thermistor) input failure'?
If your Hayward Heater shows a 'Temperature Sensor (thermistor) input failure', check the temperature sensor and replace it if necessary.
What to do if my Hayward Heater shows 'Ignitor Circuit Open'?
If your Hayward Heater displays 'Ignitor Circuit Open', check the ignitor circuit for continuity.
What to do if my Hayward Heater indicates 'Keypad failure'?
If your Hayward Heater indicates a 'Keypad failure', the solution is to replace the keypad.
What to do if my Hayward Heater displays 'Maximum return water temperature exceeded and / or rapid water temperature rise'?
If your Hayward Heater displays 'Maximum return water temperature exceeded and / or rapid water temperature rise', check the water temperature sensors and system settings.
What to do if my Hayward Heater shows 'Flame present with Gas Valve not energized'?
If your Hayward Heater shows 'Flame present with Gas Valve not energized', check the gas valve and ignition system.
What to do if my Hayward Heater displays 'Voltage polarity reversed, low voltage detected'?
If your Hayward Heater displays 'Voltage polarity reversed, low voltage detected', correct the polarity and ensure proper voltage is supplied.
What to do if my Hayward Heater shows 'Water Pressure Switch, Vent Pressure Switch, or Temperature Limit Switch Fault'?
If your Hayward Heater indicates 'Water Pressure Switch, Vent Pressure Switch, or Temperature Limit Switch Fault', inspect all associated switches for proper operation.
What to do if my Hayward Heater displays 'Blower Vacuum Switch open'?
If your Hayward Heater displays 'Blower Vacuum Switch open', inspect the blower vacuum switch for faults.
General| Brand | Hayward |
|---|---|
| Model | H300FDP |
| Category | Swimming Pool Heater |
| Language | English |
Key safety guidelines before installing or servicing electrical equipment.
Warnings and requirements for electrical shock, wiring, bonding, and using licensed electricians.
Details on entrapment risks and methods to reduce them, including outlet spacing and quantity.
Critical safety rules for circulation system operation, pressure limits, and motor fire/burn hazards.
Importance of water chemistry for heat exchanger protection and guidelines for balance.
Ensuring adequate water flow through the heater is vital for operation and protection.
Detailed table of recommended levels for chlorine, bromine, pH, alkalinity, and hardness.
Safety instructions before lighting, including gas odor detection and response.
Step-by-step guide for lighting the heater and operating the gas control knob.
Overall limitation of liability, including safety warnings for flammable materials near the heater.
