Sunpak · Ignition & Hot Rod
Sunpak Direct-Spark Ignition and Auto Re-Light: How It Works
Sunpak uses direct-spark ignition with auto re-light and a flame-sensor safety system. That's a step up from older patio heaters with standing pilots — faster startup, safer, no constant pilot gas burn.
By Ash · Updated November 10, 2026
What you need
Step by step
Understand the ignition sequence
Power on → control calls for heat → spark igniter fires → gas valve opens → flame-sensor confirms flame → heater runs. The whole sequence takes 3-10 seconds.
Know what auto re-light does
If the flame blows out mid-operation (gust of wind, momentary gas-supply dip), the flame sensor detects loss of flame → the control attempts ignition again within a few seconds. If re-ignition succeeds, you don't even notice. If it fails after a set number of attempts, the control locks out for safety.
Verify adequate electrical supply
Direct-spark ignition requires continuous 120V (or 24V, depending on model config) at the heater. Loss of power = loss of ignition. Confirm your wiring supports continuous supply.
Clear the burner area if no ignition
A dirty flame-sensor rod gives false 'no-flame' readings, locking out the heater. Wipe the flame-sensor rod with fine sandpaper every season. Spider webs or insect nests in the burner also block gas flow.
Common mistakes
- Powering down the heater at the breaker between uses. The direct-spark system needs continuous low-draw power to monitor the flame sensor. Breaker-off between uses doesn't hurt the heater, but you lose the ability to operate from a thermostat or remote until the breaker's flipped back.
- Not cleaning the flame sensor in spring. The flame sensor rod oxidizes + gathers residue over a season of use. A dirty sensor can cause the heater to lock out even with a healthy flame. 2-minute cleaning task each spring.
Hands-on tips
- If the heater won't ignite, listen for the spark click. No click = control-board or ignition-module issue (call for service). Click but no fire = gas supply or orifice issue.
- After a long storage period, the heater may need a few ignition cycles to clear air from the gas line. Each lockout + retry cycles the system.
Questions people ask
How many re-ignition attempts does Sunpak make before locking out?
Sunpak's control makes a set number of re-ignition attempts (typically 3) after a flame-loss event before locking out. The lockout is a safety feature — stops gas flow if the heater can't maintain ignition.
How do I clear a lockout?
Cycle the control at the wall or remote: OFF for 30 seconds, then ON. The control resets and tries the ignition sequence again. If it locks out immediately, the root cause (gas supply, dirty sensor, orifice issue) needs diagnosis.
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