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Overview
A real-world repair follow-up on a Kubota M4900 that wouldn't cool even after a prior compressor fix. The owner discovers the cab switch requires removing the entire roof to swap out, then stumbles on a broken HVAC plenum box and improvises a repair with epoxy, a screw, and metal duct tape. Useful for M4900 owners facing similar AC diagnosis rabbit holes, though solutions here are DIY workarounds rather than by-the-book fixes.
An owner-operator documenting hands-on farm repairs as they unfold, with no apparent commercial affiliation.