Diagnosing A Gas Stove
Gas stove burners use two types of ignition: 1) direct spark ignition and 2) standing pilot ignition. Direct spark units make a ticking sound when the burner valve switch is turned to "ignite." Standing pilot units make no noise and have a pilot flame that burns all the time under the stove top panel.
Burner Won't Ignite
- Defective spark module. Check for proper 120v supply to ignitor. Ensure valve switch is also sending 120v signal to begin ignition. If no clicking sounds heard anywhere in the range, spark module is defective.
- Grounded electrode wire. Ignition wire insulation is worn and the spark is jumping to ground before reaching the electrode.
- Bad valve switch. Test valve switch continuity.
- If ticking sound is intermittent or muffled or seems to alternate between burners, then the spark module is defective.
- Worn (leaky) ignition wire. The insulation on the ignition wire going to the electrode(s) can wear thin in spots causing the high voltage sparks to shunt to ground. This is usually accompanied by muffled ticking noises heard in odd places in the range. Inspect spark wire for wear spots in outer sheath.
- Stove electrical supply receptacle is reverse wired (hot side is neutral and neutral side is hot). Rewire receptacle observing correct polarity.
No Flame Control
- Defective burner gas valve.