AC Cold Then Goes Warm
The AC blows cold at first, then gradually turns warm. This intermittent cooling usually points to a system that's low on refrigerant or freezing/over-cycling.
Find a TechnicianCommon causes
- Low refrigerant charge
- Evaporator freezing up and blocking airflow
- Faulty pressure switch or expansion valve
- Compressor clutch cycling on and off
- Electrical connection overheating
Frequently asked questions
Why does it cool then warm up?
The most common cause is low refrigerant — there's enough to cool briefly, but not enough to keep up, so it warms as the system struggles.
Will a recharge fix it?
It may help temporarily, but if there's a leak the problem returns. A proper diagnosis finds whether it's a charge or component issue.
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