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

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

The 2-blink status code on the Rheem RGPH-07EAMGR indicates the pressure switch circuit is open. The pressure switch is a safety device that confirms the induced draft motor is creating enough negative pressure to safely vent combustion gases out of your home. The furnace will not ignite until this switch closes.

If the pressure switch does not close within 60 seconds after the draft motor starts, the control board will shut off the draft motor for 5 minutes and then retry. This cycle will continue until the issue is resolved.

The most common cause is a blocked or obstructed exhaust vent pipe. Snow, ice, leaves, bird nests, or insect nests can block the vent where it exits your home. A disconnected or cracked pressure switch hose is another common cause — the small rubber hose that connects the pressure switch to the draft motor housing can crack with age. A failing induced draft motor that cannot generate sufficient suction, or a defective pressure switch itself, are less common causes.

Common Causes

How to Fix It: Clear Vent Blockages

What You'll Need

• Flashlight
• Gloves

Steps

1. Turn off electrical power at the breaker and shut off the gas supply valve Locate the furnace circuit breaker and flip it to OFF. Turn the gas shutoff valve to the OFF position (perpendicular to the pipe). If you smell gas, leave immediately and call your gas company.
2. Inspect the exhaust vent pipe outside Go outside and locate where the furnace exhaust vent exits your home (usually a PVC pipe on an exterior wall or through the roof). Check for any blockages such as snow, ice, leaves, bird nests, insect nests, or other debris. Clear any obstructions you find. Make sure the vent termination is not buried in snow or pressed against a wall.
3. Check the intake pipe if applicable If your furnace has a separate combustion air intake pipe, check it for blockages as well. Both pipes need to be clear for the furnace to operate properly.
4. Inspect visible vent piping inside Look along the vent pipes from the furnace to where they exit the building. Check for any sagging sections, disconnected joints, or visible damage.
5. Restore power and gas, then test Turn the gas supply valve to ON and flip the circuit breaker to ON. Set your thermostat to call for heat and listen for the draft motor to start. The furnace should proceed through the ignition sequence.

When to Call a Professional

Contact a licensed HVAC technician if:

• The vent pipes appear clear but the 2-blink code persists
• The draft motor sounds unusually loud, rattles, or does not start at all
• You notice the pressure switch hose is cracked or disconnected
• The code returns intermittently, especially on windy days

✓ Verified against manufacturer service manual — March 2026