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Carrier Air Conditioner 32 / 83 Error Code

Low-pressure or discharge temperature trip on Carrier air conditioners.

CarrierAll Carrier air conditioner codes

32 / 83
Moderate DIY

Either the low-pressure switch or the compressor discharge temperature switch opened, and the compressor stopped. A single event shows as 32; after three cycles in a row the board locks the unit out and shows 83. Carrier's checklist is short: refrigerant charge and indoor airflow.

Compatible models

Infinity two-stage outdoor units; Carrier's tables for the 24ANB7 air conditioner and 25HNB6/25HNB9 heat pumps both carry these codes.

Also shown as

On heat pumps the low-side switch is a loss-of-charge switch on the liquid line. As with 31, the board retries every 15 minutes, and a lockout clears after 4 hours or a 24-volt power cycle.

Difficulty

Start with the safe checks below; a worn part may need replacing.

Not sure you are reading the code right? See how to read Carrier air conditioner codes.

Safety first: unplug the air conditioner (or switch off its breaker) before touching filters, hoses or panels. If you smell burning or gas, or see water near the outlet, stop and call a professional.

How to fix Carrier 32 / 83

  1. Replace or clean the furnace filter

    A clogged filter starves the indoor coil of air, which drags suction pressure down. Turn the system off at the thermostat, swap the filter for a new one of the same size and note the airflow arrow.

  2. Open the registers

    Walk the house and open supply registers that have been shut, and move rugs or furniture off return grilles.

  3. Look for ice

    If the copper line at the outdoor unit or the indoor coil is iced over in cooling, set the thermostat to off and the fan to on for a few hours so it thaws before anyone restarts the system.

  4. Reset the control power

    Once airflow is sorted, switch the furnace or fan coil off for a minute and back on to clear an 83 lockout.

When to call a technician

If the trip returns with a fresh filter and open vents, the system is likely low on refrigerant or has a restriction. Only an EPA-certified technician can find the leak and recharge it.

Parts linked to 32 / 83

These are the parts most often behind this code. Tap one to see what it does and the signs it is failing.

Order parts by your full model number so they fit.

Frequently asked questions

Which Carrier models show the 32 / 83 code?

Infinity two-stage outdoor units; Carrier's tables for the 24ANB7 air conditioner and 25HNB6/25HNB9 heat pumps both carry these codes.

Can I fix Carrier 32 / 83 myself?

Often. The first steps above are safe checks a homeowner can do. If they don't clear 32 / 83, the cause is likely a worn part that needs replacing.

Other Carrier air conditioner codes

Last reviewed 2026-10-22. Codes and steps can vary by model; check your owner's manual.

Sources we checked