Hi,
Is the A/C compressor engaging? If you turn the AC off, does the heat stop? Have you checked to see if there is enough refrigerant in the system?
Take a look through this link and let me know if it helps:
https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak
Also, let me know if you can control the temperature from hot to cool with the A/C off.
Let me know.
Joe
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Sunday, December 4th, 2022 AT 9:20 PM