Rheem RGPH-07EAMGR Error Code 2 Blinks (2-sec pause): Pressure Switch Is Open

What Does Code 2 Blinks (2-sec pause) Mean?

The UTEC 1012-925 IFC watches a pressure (air-proving) switch to confirm the induced-draft blower is pulling proper draft before it allows ignition. Two blinks followed by a 2-second pause tell you that switch is open — it has not closed within the roughly 60 seconds the board allows. When that happens the board stops for 5 minutes and then retries.

On this single-stage RGPH furnace the switch stays open whenever draft is too weak to create the vacuum that closes it. The most common reason is a blocked or obstructed exhaust vent — ice, snow, leaves, debris, or an animal nest can choke the flue and kill the draft. A failing induced-draft motor, or a cracked or disconnected hose to the switch, will also leave it open.

Do not confuse this "pressure switch open" code (2 blinks) with the "pressure switch shorted" code (4 blinks). Open means the switch never closed and usually points to venting or draft problems you can begin checking yourself. Shorted means the switch is stuck closed when the board expects it open before the inducer starts, which is a failed-component condition for a technician.

What You'll Notice

• The status LED repeats two blinks then a 2-second pause and no heat is produced.
• You may hear the induced-draft blower spin up, then the furnace stops before the igniter glows.
• The furnace pauses about five minutes and then tries the whole sequence again.
• In cold or snowy weather the exhaust termination outside may be visibly capped with ice, snow, or debris.

Common Causes

How This Is Diagnosed

Diagnosis follows the draft path from outside in. First the exhaust and intake terminations are checked for blockage, since a choked vent is the most common cause. If the vent is clear, a technician confirms the induced-draft motor spins up and produces draft, inspects the small hose to the pressure switch for cracks or condensate, and finally tests the switch itself.

How to Fix It: Clear the Exhaust Vent and Intake

What You'll Need

• Flashlight
• Gloves

Steps

1. Shut off power and gas before you start Turn off the furnace power switch or breaker and shut off the gas supply before inspecting. If you smell gas, leave immediately and call your gas company from outside.
2. Inspect the vent termination outside Find where the furnace's exhaust (and intake, if present) pipe exits the wall or roof. Look for ice, snow, leaves, insect or bird nests, or other debris blocking the opening.
3. Clear any blockage Gently remove debris by hand and use a flashlight to see into the pipe. Clear snow and ice away from the termination. Do not push objects deep into the pipe or disassemble the venting.
4. Check the indoor vent path Make sure nothing — stored items, insulation — is leaning against or covering the vent pipe near the furnace, and confirm the pipe looks intact with no obviously disconnected sections.
5. Restore power and gas and retry Reopen the gas supply, restore power, and let the furnace attempt to run. It may take a few minutes to cycle through.

When to Call a Professional

Contact a licensed HVAC technician if:

• The two-blink code returns even though the exhaust vent and intake are confirmed clear
• The induced-draft blower does not start, sounds labored, or is unusually loud
• You find water or condensate collecting in the vent piping or at the switch
• The furnace vents through a long or complex run you cannot safely inspect

✓ Verified against manufacturer service manual — March 2026