I used a stop leak product, but now I notice a white jell or crystalline deposit; what’s that?


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    That is an indication that your radiator needs service. Normally, it comes as a result of not changing fluids as frequently as you should or using hard water instead of distilled/soft water. Scale deposits are formed in the ducts, and the deposits may crystallize or jell. Use a flushing machine or flushing agent to get rid of the deposits.

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