Samsung Air Conditioner Error Code E497

E497 is the NO GAS error code on Samsung air conditioners, triggered by the unit's self-diagnosis system when it detects a refrigerant leak or critically low refrigerant level. The system monitors operating parameters and shuts down or alerts the user when refrigerant loss is detected. The unit will not cool or heat properly in this state and requires professional service to locate and repair the leak, followed by a proper refrigerant recharge.

Running the unit while E497 is active is not recommended. Low refrigerant causes the compressor to operate outside its designed parameters, which can lead to overheating, loss of lubrication, and permanent compressor damage. Continued operation also risks drawing moisture into the refrigerant circuit once the charge is critically low. The unit should be turned off until the leak is repaired and the system is properly recharged.

Repair costs vary widely depending on the location and severity of the leak. A minor joint repair and recharge typically falls in the range of $150 to $400. If a coil or lineset needs replacement, costs can range from $400 to over $1,200 depending on parts and labor rates in your area. Getting a diagnostic inspection from a certified technician is the best first step to get an accurate estimate.

Locating a leak through visual inspection of accessible piping is something a knowledgeable DIYer can attempt. However, handling, recovering, and recharging refrigerant requires certified technician credentials in most jurisdictions and specialized equipment including a recovery machine, vacuum pump, and manifold gauges. The repair itself, including sealing a leak and recharging the system, should be performed by a licensed HVAC technician.

A power reset may temporarily clear the error display, but the underlying cause, a refrigerant leak or low charge, will not be resolved by resetting the unit. The self-diagnosis system will detect the low refrigerant condition again once the unit attempts to operate, and E497 will return. The fault cannot be permanently cleared until the leak is repaired and the refrigerant is recharged to the correct level.