What happens to the drive motor when the room temperature goes up to +30°F and then is pulled back down to -10°F?

When the room temperature increases to +30°F and then is reduced to -10°F, several factors affect the drive motor's performance. As the temperature rises, the refrigerant molecules become more active, which can lead to higher pressures within the system. When the temperature is pulled back down, the refrigerant pressure decreases, and the compressor needs to work harder to achieve the desired cooling effect, potentially pulling more amps.

This increase in required electrical current is due to the compressor working against varying pressures, especially if there is a significant temperature differential to overcome. Consequently, the drive motor may experience an increase in electrical consumption while it operates to pull down the room temperature.

Moreover, compressor efficiency is often tied to the pressure and temperature conditions under which it operates. As the system pulls down to -10°F, if the condenser outlet pressures are not optimal, it can lead to a reduction in efficiency. This inefficiency occurs because the compressor may not effectively condense the refrigerant at lower temperatures, causing it to operate less efficiently and consume more energy relative to its output.

Thus, both the increase in current draw while pulling down and the potential drop in compressor efficiency are correct observations, leading to the conclusion that the most appropriate answer includes both elements affecting the drive