Hissing from HVAC panel?

[Midnight Specialist]

I turned on the AC earlier today and after turning it off there is a hissing noise coming from the HVAC panel. Anyone know what this might be?


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[painterdave72]

you need a rebuild kit for it most likely

[Rich]

+1

The mode switch diaphragm is a known wear item.

A. Read the DMCH Knowledge Base article (https://support.delorean.com/kb/a75/mode-switch-failure.aspx) about what failed (the rubber diaphragm).

B. Buy and install one of these (https://store.delorean.com/k114752-mode-switch-repair-kit.html) Mode Switch Repair Kits.

The kit has detailed access and teardown/rebuild instructions.