Error Code LED Off
High

Rheem RGPH-07EAMGR Error Code LED Off: No Power to Control Board

TL;DR
Your Rheem RGPH furnace's control board has no power — the status LED is completely off. Check the circuit breaker and furnace power switch first.
Disclaimer
This article is for informational purposes only and does not guarantee the accuracy or completeness of the information provided. Always turn off power and gas supply before attempting any repairs. If you smell gas, leave immediately and call your gas company. Consult a licensed HVAC technician for diagnosis and repair. Any actions taken based on this information are at your own risk.

What Does Code LED Off Mean?

The LED-off status on the Rheem RGPH-07EAMGR indicates that the UTEC 1012-925 control board is not receiving any electrical power. The furnace is completely unresponsive and will not operate in any capacity.

The control board requires both line voltage (115VAC) and low voltage (24VAC) power to function. The OK status LED should be illuminated whenever the board has power. If the LED is completely dark, power is not reaching the board.

The most common cause is a tripped circuit breaker or blown fuse at your electrical panel. The furnace power switch being turned off is equally common — this is a toggle or light-style switch usually found on or near the furnace. A blown fuse on the control board itself, a defective low-voltage transformer, or a failed control board are less common causes that require professional diagnosis.

Common Causes

Cause Likelihood DIY?
Tripped circuit breaker or blown fuse Most common ✓ DIY fix →
Furnace power switch turned off Common ✓ DIY fix →
Defective low voltage transformer Common ✗ Call a pro →
Defective control board (IFC) Uncommon ✗ Call a pro →

How to Fix It: Check Circuit Breaker and Power Switch

⚠ Safety First
Always turn off the furnace at the power switch or breaker and shut off the gas supply before beginning. Do not proceed if you smell gas — leave the area and call your gas company immediately.

What You'll Need

Steps

  1. Turn off the gas supply valve Locate the gas shutoff valve near the furnace and turn it to the OFF position (perpendicular to the pipe). This is a precaution while troubleshooting the power issue.
  2. Check the circuit breaker Go to your home's electrical panel and find the breaker labeled for the furnace or HVAC system. If it is tripped (in the middle position), flip it fully to OFF, then back to ON. If it trips again immediately, do not reset it again — call an electrician.
  3. Check the furnace power switch Look for a light-style toggle switch on or near the furnace. Make sure it is in the ON position. This switch is sometimes accidentally turned off.
  4. Verify the furnace access panel is fully seated Some furnaces have a door safety switch that cuts power when the access panel is removed. Make sure the panel is fully closed and latched.
  5. Restore gas and test Turn the gas supply valve to ON (parallel to the pipe). Check whether the OK LED on the control board is now lit. Set your thermostat to call for heat.
How to Verify
The OK LED on the control board should light up steady (indicating normal operation). The furnace should respond to a thermostat call for heat and complete a full heating cycle.

When to Call a Professional

Contact a licensed HVAC technician if:

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Sources

  1. Rheem RGPH Installation Instructions

✓ Verified against manufacturer service manual — March 2026