Frigidaire air conditioner HS error code: air discharge sensor failed

What the HS code means

HS on a Frigidaire air conditioner means the air discharge thermistor has failed. This sensor reads the temperature of the air leaving the unit. Frigidaire says to unplug the unit for about 30 seconds, then contact support if HS comes back.

The discharge thermistor sits where conditioned air leaves the unit. The board uses it to check the unit is cooling, or heating on heat/cool models, as expected. If the reading is missing or impossible, it shows HS.

Like AS and ES, HS is a sensor fault rather than a refrigerant or compressor problem. A single code after a power cut may clear with a reset; a repeat means a part has failed.

Common causes

Listed from most to least common.

1. Air discharge thermistor failed
2. Thermistor plug loose on the control board
3. Thermistor wire damaged
4. Brief power glitch
5. Control board fault

How to fix the HS code

Unplug the air conditioner or switch it off at the breaker before removing any panel or filter.

1. 1

   Step 1: Unplug the unit

   Unplug the air conditioner for about 30 seconds.

2. 2

   Step 2: Check the outlet and cord

   Use a wall outlet, not an extension cord. If the plug has TEST and RESET buttons, press RESET.

3. 3

   Step 3: Restart and watch

   Turn the unit on and let it run. If HS stays away for a day, it was likely a glitch.

4. 4

   Step 4: Contact Frigidaire if it returns

   If HS comes back, stop using the unit and contact Frigidaire support.

How to reset the Frigidaire air conditioner

1. Turn the air conditioner off with the remote or the control panel.
2. Cut the power. Frigidaire says to unplug window and portable units for about 30 seconds. For a mini-split, turn off its breaker for a few minutes.
3. Restore power and turn the unit back on. The compressor normally waits about 3 minutes before starting, so give it time before judging.
4. If the same code comes back, the fault is still there. Work through the fix steps above, or contact Frigidaire support.

Parts that may need replacing

Check your model number on the label inside the door or on the back before ordering.

• Frigidaire AC thermistorCheck prices

When to call a technician

If HS returns, the discharge thermistor or the control board needs replacing inside the cabinet. Book a technician or contact Frigidaire.

A typical repair for this code costs $120–$300 in the US, including parts and labor. Prices vary by area and model.

Models this applies to

• Window air conditioners (including Frigidaire Gallery)
• Portable air conditioners
• Ductless mini-splits

Codes can differ slightly between models. Your owner's manual is the final word and is available from Frigidaire support.

Frequently asked questions