AIR CONDITIONING SERVICE TIPS

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When discussing air conditioning systems in motor homes, we must distinguish between the automotive, or dash air conditioning, and the coach air conditioning. We will not get into a technical description of how an a/c system works.

The dash A/C is just like the one used in your car. Newer vehicles utilize a refrigerant called R134A, while older vehicles use a refrigerant called R12. The compressor is driven by the vehicle’s engine. The condenser is located in front of the vehicle’s radiator and the evaporator is located in the dash blower assembly. The dash air is designed to cool the cab area of the vehicle and is not intended to cool the entire coach.

The coach a/c compressor is powered by 110 volt A/C. It uses a refrigerant called R22. The entire assembly, including the condenser and evaporator, is located in one compact unit. Coach a/c systems can be further separated into two distinct categories: roof and package/central.

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