Error Codes
What size gas line for Whirlpool gas range?
For the Whirlpool WFG320M0MW0 freestanding gas range, we use a 3/4-inch rigid gas supply pipe to the range location for best flow. On LP (propane) systems, 1/2-inch minimum piping or tubing is commonly used; undersized pipe on long runs can cause weak burner performance.
- Natural gas: 3/4-inch rigid pipe to the range location
- LP (propane): 1/2-inch minimum piping or tubing (verify with your LP supplier)
- Use an approved flexible gas connector sized for ranges (local code may specify length and type)
- Install a manual shutoff valve in an accessible spot near the range
- Use a sediment trap (drip leg) where required by code to help keep debris out of the regulator
If the supply line is too small, gas pressure can drop when the oven burner and surface burners run. That can show up as slow preheat, low flames, or burners that struggle to stay steady.
| Fuel type | Typical supply pipe to range location | What can go wrong if undersized |
|---|---|---|
| Natural gas | 3/4-inch rigid pipe | Low flame, slow oven heat, poor ignition |
| LP (propane) | 1/2-inch minimum | Low flame, uneven baking, weak broil |
If your gas supply is correct but the oven still heats poorly, these model-matched parts are common suspects:
- Igniter, hot surface W11590294 (weak igniter can prevent the gas valve from opening fully)
- Oven burner W11220387 (clogged or damaged burner can cause uneven flame)
- Range oven temperature sensor WPW10181986 (bad sensor can cause temperature swings)
We recommend having a qualified installer or gas technician verify pipe sizing, regulator setup, and leak testing to local code.
Last updated: February 2026
How to find Whirlpool gas range model number?
For a Whirlpool gas range like model WFG320M0MW0, the model number is printed on a rating label on the range body (not on a removable part). On many Whirlpool freestanding ranges, you can find it by pulling out the bottom drawer or warming drawer and looking along the frame behind it.
Check these common label locations in this order:
- Behind the warming drawer or storage drawer: pull the drawer out fully and look on the frame or side rail
- Oven door area: open the oven door and look around the front frame (left or right side)
- Back of the range: label may be on the rear panel (easiest to see with a flashlight)
- Lower side panel: sometimes on the left or right side near the bottom
The rating label usually includes both a model and serial number. Record these exactly:
- Model number (example format: WFG320M0MW0)
- Serial number
- Gas type and electrical rating (helpful for service)
| Item on label | Why we need it | Example format |
|---|---|---|
| Model number | Ensures exact part fit | WFG320M0MW0 |
| Serial number | Helps match production changes | Letters and numbers |
| Gas type | Confirms natural gas vs LP setup | NG or LP |
Whirlpool ranges can look identical across several model numbers, but internal parts can differ by revision. Using the exact model number helps us match the correct igniter, burner, control, or door parts the first time.
Use these practical checks:
- Remove the drawer completely (most lift slightly, then pull out)
- Use a flashlight and look for a white or silver sticker
- Wipe grease or dust off the frame edge so the print is readable
- If the label is damaged, use the appliance’s parts as clues (for example, matching an igniter like igniter, hot surface W11590294 can help narrow the correct diagram)
Last updated: February 2026
Why is my Whirlpool cooktop igniter not working?
On the Whirlpool WFG320M0MW0 gas range, a cooktop igniter usually stops working because the burner cap is mis-seated, the igniter tip is dirty or wet, or the spark system is not getting power through the switch, wiring, or spark module. Most fixes start with cleaning and correct burner alignment.
- Make sure the burner cap is centered and sitting flat on the burner base.
- Dry the burner area completely (spills and cleaning water can stop sparking).
- Clean the igniter tip and the metal burner ports with a soft brush; clear food residue.
- Confirm the burner grate is seated correctly and not pushing the cap out of position.
- Try a different burner knob; if one knob works and another does not, the switch for the bad knob is likely the issue.
If cleaning and alignment do not help, the problem is typically in the ignition circuit.
| Symptom | Most likely cause | What we recommend |
|---|---|---|
| No clicking on any burner | No power to range, failed spark module, loose harness | Check outlet and breaker; inspect connections; consider replacing the java tech spark module 4 pos W11590249 |
| Clicking happens but no spark at one burner | Dirty/wet igniter, cracked ceramic, bad switch, damaged wire | Dry and clean; inspect for cracks; check wiring at the burner |
| Constant clicking even when knobs are off | Moisture in switch, stuck switch, shorted wire | Dry thoroughly; inspect switch area; repair damaged wiring |
- Java tech spark module 4 pos W11590249 (creates spark for the cooktop igniters)
- Burner-related issues can also be caused by misalignment or debris; if the oven is also having ignition trouble, the igniter, hot surface W11590294 is a common repair part for the oven burner system (separate from the cooktop spark).
A weak or missing spark can allow gas to flow without reliable ignition, which leads to delayed lighting, uneven flames, and poor cooking performance. Restoring a strong, consistent spark helps the burners light quickly and safely.
Last updated: February 2026
