Ruud UGPH-07EAMGR Error Code LED Steady On: Normal Operation
What Does Code LED Steady On Mean?
A steady (non-blinking) green "OK" status LED on the UGPH-07EAMGR's UTEC 1012-925 board means the microprocessor is powered and healthy and no fault is stored. This is the normal resting and running indication — it is exactly what you want to see. Fault conditions on this board instead show up as a counted number of blinks (1 through 4) followed by a 2-second pause, so a solid light means none of those are active.
Because a steady LED confirms the board itself is fine, any "no heat" complaint while the LED is solid points somewhere else — most often the thermostat, its settings or wiring, or a call for heat that isn't reaching the board. This is the opposite of the dark-LED state on the same board, which means the board has lost power entirely.
Note that there is a separate amber flame-sense LED on this control that reports flame current during a burn. The green "OK" LED being steady is about board and microprocessor health, not flame — so watch the correct light for the question you are asking.
What You'll Notice
- The green "OK" status LED glows steady and does not blink
- The furnace otherwise responds normally to the thermostat and heats when called
How This Is Diagnosed
No fault diagnosis is needed when the LED is steady — the board is reporting itself healthy. If the furnace still is not heating, confirm the thermostat is set to "Heat" and above room temperature and has good batteries, then verify the call for heat is reaching the furnace, since issues there sit outside the control board. If everything at the thermostat is correct and it still will not heat, a technician can check the thermostat wiring and low-voltage circuit.
- The status LED is steady but the furnace will not heat even with the thermostat set to Heat and above room temperature
- The green LED later changes to a repeating blink pattern — count the blinks and look up that specific code
Frequently Asked Questions
My LED is solid green but there's no heat — is the furnace broken?
The board is fine — a steady LED means no fault. Start at the thermostat: confirm it is on Heat, set above room temperature, and has fresh batteries, since the problem is usually there rather than in the furnace control.
Should the LED ever turn off?
When the furnace has power the "OK" LED should be lit. A completely dark LED means the board has lost power (check the furnace switch and breaker), while a blinking LED means a specific fault code.
Sources
✓ Verified against manufacturer service manual — March 2026