Rheem RGRA-07EMAES Error Code 2 Blinks: Pressure Switch Circuit Open

What Does Code 2 Blinks Mean?

Two blinks of the green STATUS LED on the Rheem RGRA-07EMAES is the UTEC 1012-925 Integrated Furnace Control (IFC) reporting that the pressure switch circuit is open. Before the board will let the igniter and gas valve fire, it energizes the induced-draft motor (IDM) and waits for the pressure switch to sense adequate draft and close. If that switch does not close within 60 seconds, the IDM stops for 5 minutes and the board retries, protecting the home from operating with poor venting.

The pressure switch is a safety interlock that proves the exhaust is actually flowing, not just that the inducer is spinning. On this single-stage design there is one pressure switch and one draft proving stage, so anything that reduces draft — a blocked vent or intake, a slipped or cracked sensing hose, moisture trapped in the switch, or a weak inducer — keeps the switch open and holds this code. Strong wind gusting into the termination can also momentarily open the switch.

This is the opposite condition of the 4-blink code, which is the pressure switch stuck closed when the board expects it open. Together the two codes let the IFC confirm the switch moves correctly in both directions. The most common cause a homeowner can address is an obstructed exhaust vent — ice, snow, leaves, or an animal nest at the outdoor termination. The deeper causes (hose, switch, inducer, heat exchanger, vent sizing) are technician diagnoses.

What You'll Notice

• No heat, and the green STATUS LED repeats a two-blink pattern
• The inducer motor spins up but the igniter never glows and the burners never light
• The furnace runs the inducer for about a minute, shuts off, then retries roughly every 5 minutes
• You may see a blocked, iced-over, or debris-clogged vent or intake pipe outside the home
• The problem often appears after a snowstorm, heavy leaf fall, or high winds

Common Causes

How This Is Diagnosed

Start with the one check that is both safe and most often the cause: inspect the exhaust and intake terminations outside the home for ice, snow, nests, or debris and clear anything blocking them. Because wind can momentarily open the switch, note whether the fault only appears in gusty conditions.

If the vent is clear and the code persists, a technician takes over. They confirm the inducer is drawing proper draft, check the pressure-switch sensing hose for cracks, disconnection, or water, measure the switch for correct open/close operation, and inspect for excessive vent length or too many elbows and for a blocked heat exchanger. Those checks involve the draft system and wiring and are not homeowner work.

How to Fix It: Clear a Blocked Exhaust or Intake Vent

What You'll Need

• Flashlight
• Gloves
• Soft brush or gloved hand for clearing debris

Steps

1. Turn off electrical power at the breaker and shut off the gas supply valve Set the furnace circuit breaker (or the furnace power switch) to OFF and turn the manual gas shutoff valve to OFF before inspecting the venting. If you smell gas, leave immediately and call your gas company.
2. Find the vent and intake terminations outside Locate where the furnace's PVC or metal vent pipes exit the home — through an outside wall or up through the roof. High-efficiency installations usually have two pipes (exhaust and intake) close together.
3. Inspect for blockages Look for snow, ice, leaves, insects, spider webs, or a bird or rodent nest covering or plugging either pipe. Check that a screen or grille on the termination is not caked with debris.
4. Clear what you can safely reach Gently remove snow, ice, or debris from the openings by hand or with a soft brush. Do not push objects deep into the pipe or disassemble any furnace piping. Only clear the outside termination you can safely reach from the ground.
5. Restore power and test Turn the gas valve back ON, set the breaker or power switch to ON, then set the thermostat to call for heat and watch a full startup cycle.

When to Call a Professional

Contact a licensed HVAC technician if:

• The outdoor vent and intake are clearly open but the two-blink code keeps returning
• The inducer motor is noisy, weak, or does not spin up at all
• You find water or moisture inside the pressure-switch hose or the switch itself
• The furnace was recently installed or re-vented and has never worked reliably
• The vent appears to have long runs or many elbows that may exceed the allowed length

✓ Verified against manufacturer service manual — March 2026