| Blowing out refrigerant circuit |
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| On vehicles where no adapters fit the refrigerant pipes, blow through individual components using an air gun, for example, with rubber nozzle. When doing this, be particularly careful not to damage the connections (do not crush or scratch them). |
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| The evaporator should be blown through from the connection to the low-pressure side (large diameter), with the expansion valve or restrictor removed. |
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| Always blow through components opposite the direction of refrigerant flow. |
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| Examine the expansion valve; renew if dirty or corroded. |
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| If components bear dark, sticky deposits which cannot be removed with compressed air, renew these components. |
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| Thin, light grey deposits on the insides of refrigerant pipes do not impair the function of the components. |
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| After blowing out the system, always renew the receiver or reservoir and the restrictor. If the condenser has a dryer, renew the dryer cartridge or dryer. |
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