Here are some possible reasons why you might be facing this problem:
Manufacturing Defect: During the production process, mistakes can happen, leading to the improper calibration of the knobs. If the settings on the stove were intended to have varying heat levels but all ended up being "high," it could be a mistake in setting the components.
Cost-Effective Design: Sometimes, manufacturers design stoves with three knobs for aesthetic or cost reasons but only provide a single heat output level, typically the highest setting. This can help keep the production costs down while maintaining the appearance of a more sophisticated control system.
Simplified Design: Some stoves are designed with simplicity in mind, offering only one heat level for all burners. This design choice might be suitable for certain cooking styles or environments where precise temperature control isn't necessary.
Mislabeling: It's also possible that the stove was designed with multiple heat settings initially, but a mislabeling issue occurred, making all the settings appear as "high."
Regardless of the reason, if you believe there is an issue with your gas stove, I recommend contacting the manufacturer or the retailer from whom you purchased it. They may offer troubleshooting assistance, warranty coverage, or potential solutions to address the problem. In some cases, they might be able to replace or repair the stove if it is found to be faulty.