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2003 Lincoln LS - Crazy HVAC

Cabin air conditioning normally working suddenly switches to blast heat mode sometimes, My mechanic tried replacing thermostat and some piping near valve covers. Both of us are frustrated. He says can’t solve problem until intermittently malfunctioning control element totally fails.
My body can’t stand overheating much more
What troubleshooting do you recommend for resolving now! Car works very well otherwise and fits my limited retiree mileage and budget.

I’d suggest you find a more competent mechanic. Even if more expensive, they will save you money in the end.

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Sounds like the HVAC blend door actuator motor is failing.

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On Mon, Aug 27, 2018 at 1:47 PM Guy Rhodes wrote: Will check. Thanks much for ur thoughts and time