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ErrBase

ResMed CPAP Air Too Warm: How to Cool Down Your Therapy

Quick Answer

Warm air from a ResMed AirSense 10 or 11 is caused by the Climate Control system heating humidity and tubing temperature too high relative to room conditions. In Auto mode, the device calibrates based on its ambient temperature sensor, but it can overshoot in warm rooms or during summer months.

Warm air from a ResMed AirSense 10 or 11 is caused by the Climate Control system heating humidity and tubing temperature too high relative to room conditions. In Auto mode, the device calibrates based on its ambient temperature sensor, but it can overshoot in warm rooms or during summer months. The fix is to reduce the humidity level from your current setting down by 2-3 steps, lower the heated tube temperature if using ClimateLineAir, or switch from Auto to Manual Climate Control for direct control over both values. Switching to standard non-heated tubing in warm weather also allows the air to cool naturally before reaching the mask.

ResmedCpapSeverity: low95% DIY Success
Time to Fix
2–5 min
Difficulty
beginner
Parts Cost
$0 – $0
Tools Needed
None

What Does the AIR-WARM Code Mean?

Your ResMed CPAP air feels too warm because the humidity level or heated tube temperature is set too high. Reduce humidity, lower tube temp, or switch Climate Control from Auto to Manual.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Humidity level set too high (level 6-8)40%
Heated tube temperature set too high24%
Climate Control Auto mode overshooting in warm room14%
Device near a heat source or in direct sunlight12%
Room temperature above 75 degrees F10%

Symptoms You May Notice

  • Air at the mask feels uncomfortably hot
  • Sweating around the mask area
  • Feeling of breathing through a hot towel
  • Waking up overheated
  • Condensation forming on face near mask edges

Can you reset a Resmed cpap to clear the AIR-WARM code?

AirSense 10: Settings > Device > Reset Device restores Climate Control to Auto mode with default levels. AirSense 11: My Device > Factory Reset. After resetting, manually set humidity and tube temperature to your preferred lower values.

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Reduce the humidity level

Reduce the humidity level. On AirSense 10, go to Settings > Climate Control > Humidity Level and reduce by 2-3 steps (for example, from level 6 to level 3 or 4). On AirSense 11, go to My Comfort > Humidity and adjust similarly.

2

If using ClimateLineAir heated tubing, lower the tube temperature

3

Switch from Auto to Manual Climate Control mode for more direct

4

In warm weather

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
ResMed standard (non-heated) CPAP tubingN/A · $0–$0

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPLACE
Estimated Cost: $0 (Parts) vs $800 (New Machine)

Frequently Asked Questions

What humidity level should I use on my ResMed CPAP?
Most users find level 3-5 comfortable year-round. In summer or warm climates, level 2-3 is often sufficient. In dry winter conditions, level 5-6 may be needed. Start at level 4 and adjust up or down based on whether you experience dryness (increase) or warmth and condensation (decrease).
Can I turn off the humidifier completely?
Yes. Set Climate Control to Off or remove the water chamber entirely. The device delivers therapy normally without humidification. However, breathing dry pressurized air all night may cause nasal dryness, nosebleeds, and throat irritation - especially if you live in a dry climate.
Should I change settings between summer and winter?
Many users do. Higher humidity and heated tubing work well in cold dry winter months but can cause warm, wet air in summer. Consider lowering humidity by 2-3 levels in summer, reducing tube temperature, or switching to standard non-heated tubing during warm months.

Related Resmed Cpap Error Codes

Code: HUBResMed CPAP Error Codes: Complete AirSense 10 and 11 Fault GuideCode: SNOWFLAKEResMed CPAP Snowflake Symbol MeaningCode: HUMID-FAULTResMed CPAP Humidifier Not WorkingCode: LEAK-WATERResMed CPAP Leaking Water: Causes and Fixes

Models Known to Experience AIR-WARM Errors

This repair applies to most Resmed cpaps with this error code. Common model numbers include:

AirSense 10 AutoSet, AirSense 10 CPAP, AirSense 10 Elite, AirSense 10 For Her, AirSense 11 AutoSet

Last verified for technical accuracy on March 15, 2026