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ALMCODE 1, 2, 3 or 4 > 0

Alarm Code 1, 2, 3, or 4 Present — Alarm or Alert Detected

Rheem · Air Conditioning

What does ALMCODE 1, 2, 3 or 4 > 0 mean?

One or more alarm codes (ALMCODE 1 through 4) have a value greater than zero. This signifies that the control board has registered a specific alarm or alert condition that requires attention.

Common Causes

  • Specific fault condition registered by the control board
  • Sensor malfunction
  • System error detected

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Access the 'CURRENT ALARMS' menu on the display panel.

  2. 2

    Scroll through the list to identify the specific ALMCODE and its associated issue.

  3. 3

    Refer to the manual or app for the meaning of the specific ALMCODE.

  4. 4

    Perform any recommended troubleshooting steps for that code.

  5. 5

    Clear the alarm by pressing the 'Clear Alarm' button if appropriate.

  6. 6

    Contact customer support if the issue cannot be resolved.

Browse all codes in this manual (48)
Verified technical data. Last updated: April 2026

Related Faults

1 beep1 beep - WiFi Soft Reset initiated3 beeps3 beeps - WiFi Hard Reset initiated3 red flashes3 red flashes — Communication error
Source: Rheem Air Conditioning
Open Manual (Page 22)Search more codes in this manual