Hummer H3 A/C blowing hot air, recommend testing low and high pressure switches on Hummer H3

Some Hummer H3 owners report experiencing issues with their A/C blowing hot air, which may be linked to faulty low-pressure and high-pressure switches. If the low-pressure switch fails its resistance test, it may require replacement to ensure the A/C system functions properly. Additionally, some owners find that the high-pressure switch, which serves as a safety feature to prevent over-pressurization, needs to be tested after allowing the vehicle's engine to sit and equalize pressure. By diagnosing these components, owners can identify potential causes of the hot air issue in their Hummer H3's A/C system.