Amana AMVC960803BN Error Code EEd: Auxiliary Limit Switch Open
What Does Code EEd Mean?
Error code EEd on the Amana AMVC960803BN indicates that the auxiliary limit switch located in the blower compartment has opened. This is a separate safety switch from the primary high limit (EE3) and monitors temperature specifically in the blower area.
The auxiliary limit switch trips when there is insufficient airflow over the heat exchanger, causing excessive heat to build up in the blower compartment. This can also occur if the 115V power supply was interrupted during an active heating cycle, which prevents the blower from running to dissipate residual heat.
The most common cause is a dirty or clogged air filter that restricts airflow through the system. Other causes include blocked ductwork, closed supply registers, a blower motor running at an incorrect speed, or a failing blower motor that is not moving enough air. Because this switch is in the blower compartment, issues with the blower motor or its airflow path are particularly relevant.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Dirty or clogged air filter | Most common | ✓ DIY fix → |
| Blocked or restrictive ductwork | Common | ✗ Call a pro → |
| Failed or slow circulator blower motor | Common | ✗ Call a pro → |
How to Fix It: Check and Replace the Air Filter
What You'll Need
- Replacement air filter (correct size for your system) 🛒 Find at FiltersFast · 🛒 Find at Amazon
- Flashlight
Steps
- Turn off electrical power and gas supply 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 at any point, leave immediately and call your gas company.
- Locate and inspect the air filter The air filter is typically in the blower compartment behind the lower access panel, or in a filter rack at the return air duct. Slide the filter out and inspect it. If the filter is visibly dirty or you cannot see light through it when held up to a light source, it needs to be replaced.
- Replace the air filter Insert a new filter of the correct size. Make sure the airflow direction arrow printed on the filter frame points toward the furnace blower. A clogged filter is the most common reason the auxiliary limit switch trips.
- Check all supply vents and return air registers Walk through your home and verify that all supply vents and return air grilles are open and not blocked by furniture, rugs, or curtains. Closing too many registers can restrict airflow enough to trigger the auxiliary limit switch.
- Restore power and gas, then test Replace the access panel, turn the gas supply valve to ON, and flip the circuit breaker to ON. Allow the furnace to cool for several minutes if it was recently overheated — the auxiliary limit switch needs to reset. Set your thermostat to call for heat and monitor the furnace.
When to Call a Professional
Contact a licensed HVAC technician if:
- EEd returns after replacing the air filter and opening all vents
- The blower motor sounds abnormal (grinding, squealing, or humming without spinning)
- Airflow from the supply vents feels noticeably weak even with a clean filter
- The furnace repeatedly cycles on and off in short intervals
- You also see EE3 (high limit) codes along with EEd
Sources
✓ Verified against manufacturer service manual — March 2026