Midea Air Conditioner P1 Error Code: What It Means and How to Fix It

Last updated: October 5, 2026 · Codes covered: P1 · Sources

Verify in your manual: Drain plug positions and drain options vary by Midea portable model; check your user manual.

P1 on a Midea portable air conditioner means the bottom water tray is full. It's a protection code, not a breakdown, and in almost every case you can fix it yourself in a few minutes by draining the water. If P1 keeps coming back right after you drain it, call Midea for service.

What the P1 code means

Midea's US portable AC FAQ says: "P1 - Bottom tray is full - Connect the drain hose and drain the collected water away. If protection code repeats, call for service." The same line appears in Midea's portable AC user manuals.

A portable AC pulls moisture out of the air as it cools. Midea's FAQ explains that this water collects in an internal drain pan, and most of it is evaporated and sent out the exhaust hose. In humid weather, more water collects than the unit can get rid of, and the tray fills up.

According to Midea's manuals, when the water reaches a set level:

• the unit beeps 8 times and the display shows P1
• cooling and dehumidifying stop immediately
• the fan keeps running, which Midea says is normal

Midea's troubleshooting table also notes that P1 can be the reason a unit doesn't seem to turn on when you press ON/OFF.

Look-alike codes that mean something different: Midea's FAQ lists E1 (room temperature sensor error), E2 (evaporator temperature sensor error), E3 (condenser temperature sensor error, select models), and E4 (display panel communication error). Those are faults, not a full tray. Codes can vary by model, so check your user manual.

Likely causes (most common first)

1. Humid weather or a humid room. The more moisture in the air, the faster the tray fills. Midea's manuals warn against running a portable AC in a humid room such as a bathroom or laundry room.
2. Running in Dry (dehumidify) mode without a drain hose. Midea's manuals tell you to install the drain hose in Dry mode.
3. Running in heat mode without a drain hose (heat-pump models). Midea says you must install the drain hose in heat mode, because the unit makes condensate that has to drain.
4. A drain hose that's kinked, blocked, or pointing uphill, so water can't flow out.
5. A drain plug that's missing or loose, or the wrong plug removed for your mode.
6. A water-level sensor or internal fault. If P1 comes back right after you've fully drained the tray, Midea says to call for service.

How to fix it, step by step

Have a shallow pan and some towels ready. Midea warns that water starts pouring out as soon as you open the drain.

1. Turn the unit off and unplug it. Midea's manuals say to always unplug the unit before cleaning or servicing it.
2. Move it to where you can drain it. Midea says to carefully move the unit to a drain location.
3. Drain the bottom tray.
   • Put the pan under the bottom drain plug on the back of the unit.
   • Remove the plug and let the water drain away.
   • To get the last of it out, Midea's FAQ says to tip the unit back slightly.
   • Empty the pan as needed.
4. Reinstall the bottom drain plug firmly. Midea stresses this, because a loose plug will leak.
5. Plug in and restart. Turn the unit back on. Midea says to restart until the P1 symbol disappears.
6. Set up continuous drainage if P1 keeps filling up fast. This depends on your model and mode, so check your manual.
   • Dry/dehumidify mode: Midea's manuals say to remove the upper drain plug (or the drain plug on some models), attach the drain hose, and put the hose end in a floor drain or bucket.
   • Heat mode (heat-pump models): you must use the drain hose. On some models it goes on the middle drain port.
   • Keep the hose free of kinks, and keep the end pointing downward.
   • On models with a built-in condensate pump, Midea says the hose can be raised up to 6 ft (1.8 m). Otherwise, keep the hose end lower than the drain outlet.
   • When you're not using the hose, put the drain plug back in firmly.
7. Keep the air moving. Make sure the exhaust hose is connected, not crushed, and that nothing blocks the air inlets. Midea says not to overextend or bend the exhaust hose.
8. Call for service if P1 comes back right away. If the tray is empty and the code still shows, or it returns within minutes, the water-level sensor or something else inside may be at fault. That's a repair for Midea service.

Test the part

The part behind P1 is the tray's water-level sensor (float switch), which is inside the unit. Midea's FAQ says it's not advised to remove the case, so stick to these outside checks.

1. Unplug the air conditioner. Pull the plug from the wall before you check anything.
2. Confirm the tray is really empty. With a pan in place, open the bottom drain plug again. If more water comes out, drain it fully, tipping the unit back slightly as Midea describes.
3. Check the drain plugs. Each plug should have its seal and screw in snugly. A cracked or missing plug can leak.
4. Check the drain hose. Disconnect it and look through it. It should be clear, with no kinks, and run downhill (unless your model has a condensate pump).
5. Check the drain port. Look for gunk or debris blocking the opening where the hose connects, and gently clear anything you can see from the outside.
6. Don't open the case. No meter tests are given here because the sensor is inside the unit. Don't try to reach the float, and don't open the sealed refrigerant system.

If the tray is empty, the plugs and hose are fine, and P1 still shows, call Midea.

Safety notes

When to call a pro

Contact Midea or an authorized service provider if:

• P1 comes back right after you've fully drained the tray.
• Water leaks from the unit even with the drain plugs firmly in place.
• The display shows an E code (E1 to E4) instead of P1.
• The unit is under warranty.

Midea US customer service is at 1-866-646-4332, Monday to Friday, 8 a.m. to 7 p.m. ET, and Saturday, 9 a.m. to 4 p.m. ET (per Midea's US support page). Have the model number from the silver nameplate on the back of the unit ready.

FAQ

Related

• All air conditioner error codes