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ErrBase

ResMed CPAP Heating System Error: Causes and Fixes

Quick Answer

The Heating System Error on ResMed AirSense devices is a specific hardware fault indicating the heating plate inside the HumidAir water chamber or the device-side circuit that drives it has failed electrically. This is different from a general humidifier connection fault. The heating plate in the water chamber can fail after 2-3 years of nightly heating cycles as the nichrome element degrades.

The Heating System Error on ResMed AirSense devices is a specific hardware fault indicating the heating plate inside the HumidAir water chamber or the device-side circuit that drives it has failed electrically. This is different from a general humidifier connection fault. The heating plate in the water chamber can fail after 2-3 years of nightly heating cycles as the nichrome element degrades. The first troubleshooting step is still to clean the contact pins, since a poor connection can mimic a heating circuit fault. If cleaning does not resolve it, try a new water chamber ($25-40). If the error persists with a new chamber, the device-side driver circuit has failed and requires DME service or warranty replacement.

ResmedCpapSeverity: medium60% DIY Success
Time to Fix
5–20 min
Difficulty
beginner
Parts Cost
$0 – $0
Tools Needed
Isopropyl alcohol wipes, Cotton swabs

What Does the HEAT-ERROR Code Mean?

Heating System Error means the humidifier heating plate circuit has failed. Clean the contacts first, then try a new water chamber. If the error persists, the device needs DME service.

Most Likely Causes

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

Heating plate element degraded from thermal cycling40%
Corroded contact pins mimicking a circuit fault24%
Device-side heating driver circuit failure14%
Mineral scale buildup insulating the heating plate12%
Water chamber damaged by dishwasher heat10%

Symptoms You May Notice

  • Heating System Error message on screen
  • Humidifier does not heat water
  • Water chamber remains cold during therapy
  • Air at mask is dry and unheated
  • Error clears temporarily then returns

Can you reset a Resmed cpap to clear the HEAT-ERROR code?

AirSense 10: Settings > Device > Reset Device. AirSense 11: My Device > Factory Reset. A reset may clear a software-triggered heating error but will not fix a failed heating plate or driver circuit.

Tools Required for Diagnosis

Isopropyl alcohol wipesCotton swabsSoft dry cloth

Diagnostic Checklist

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

1

Remove the water chamber and clean all gold contact pins on the

Remove the water chamber and clean all gold contact pins on the chamber bottom and inside the device base using isopropyl alcohol on a cotton swab. Corroded contacts can cause a false heating circuit error. Let pins dry for 30 seconds before reinserting.

2

Reseat the water chamber firmly until it clicks

3

Try a new ResMed HumidAir water chamber

4

If the Heating System Error persists with a new chamber and

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 HumidAir Water ChamberN/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

Is Heating System Error dangerous?
No. The error disables the humidifier heating function but does not affect the motor or pressure delivery. Your CPAP still treats your sleep apnea normally. The only impact is dry air delivery, which can cause nasal and throat dryness but is not dangerous.
How long does a HumidAir water chamber last?
ResMed recommends replacing the water chamber every 6-12 months. The heating plate inside undergoes thermal stress every night (heating to operating temperature then cooling), which gradually degrades the element. Chambers used beyond 12 months are more likely to develop heating faults.
Does insurance cover a replacement water chamber?
Most insurance plans, including Medicare, cover CPAP supply replacements on a schedule. Water chambers are typically covered every 6 months. Contact your DME provider to verify your coverage and order a replacement.

Related Resmed Cpap Error Codes

Code: HUBResMed CPAP Error Codes: Complete AirSense 10 and 11 Fault GuideCode: HUMID-ERRORResMed CPAP Humidifier FaultCode: HUMID-FAULTResMed CPAP Humidifier Not WorkingCode: 24ResMed CPAP Error 24: Climate Control Sensor Fault

Models Known to Experience HEAT-ERROR 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, AirCurve 10 VAuto, AirCurve 10 ST

Last verified for technical accuracy on March 15, 2026