Which condition could potentially compromise the performance of a propane regulator?

The performance of a propane regulator can be significantly compromised by exposure to contaminants from the environment. Propane regulators are designed to maintain a consistent pressure for the gas flowing into a system, and any foreign material such as dirt, dust, or moisture can interfere with their operation. Contaminants can clog the internal components of the regulator, impairing its ability to accurately control gas flow and pressure.

Additionally, contaminants can cause corrosion or other damage to the regulator over time, leading to potential leaks or malfunctions. This is why regulators are often designed with filters or protection against environmental elements to maintain their integrity and effectiveness. Keeping the regulator free from contaminants is essential for the safety and reliability of the propane system.

While the other options mention conditions that could affect usage, such as humidity, temperature changes, or propane quality, they do not pose as direct a threat to the mechanical functions of the regulator as contaminants do.