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How often do you need to change the expansion vavle on a 99 saturn s series?
Wiki User
∙ 12y ago
The expansion valve should function normally as long as it is not contaminated and blocked with particles. Refrigerant and lubricants should be the only materials that are circulating through a normal AC system that is in good operating condition.
When an AC compressor fails it CAN start throwing particles, little pieces of worn compressor.
If an AC compressor has failed in a way that causes particles in the refrigerant, the entire system must be flushed and the expansion valve should be replaced.
But realistically, even though many AC shops will just want to replace everything, you shouldn't need to replace the expansion valve if the refrigerant and oil are still clean.
Wiki User
∙ 12y ago
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