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T504

T504 - WiFi chip communication error

Rheem · Air Conditioning

What does T504 mean?

There is an error with the WiFi chip's communication. This prevents the unit from connecting to or maintaining a stable connection with your network.

Common Causes

  • WiFi chip malfunction
  • Network connectivity issue
  • Incorrect WiFi settings

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Perform a WiFi Soft Reset by holding the WiFi button for 3 seconds.

  2. 2

    Perform a WiFi Hard Reset by holding the WiFi button for 5 seconds.

  3. 3

    Follow the on-screen prompts in the EcoNet App to set up WiFi again.

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
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