The thermal limiter blows for a reason. Typically because the cycling thermostat starts to get wonky. This is why they are sold in pairs. Always replace them both.

Another reason that fuse can go is because of an air restriction. Check the blower housing for lint build up, and clean your vents out.

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Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2