Goodman GMVC960803BN Error Code EEd: Auxiliary Limit Switch Open
What Does Code EEd Mean?
Error code EEd on the Goodman GMVC960803BN indicates that the auxiliary limit switch in the blower compartment has opened. This safety switch monitors temperature in the blower area and shuts down the furnace when it detects overheating. The furnace will not operate until the switch resets.
The auxiliary limit switch can trip for the same reasons as the primary high limit switch (EE3): insufficient conditioned air flowing over the heat exchanger. However, this switch specifically monitors the blower compartment area. It can also trip if the 115-volt power supply was interrupted during an active heating cycle, causing residual heat to build up without the blower running to dissipate it.
Common causes include a dirty or clogged air filter, blocked or closed supply and return vents, restrictive ductwork, an incorrect circulator blower speed setting, or a failing blower motor. A power interruption during a heat call (such as a brief power outage) can also trigger this code.
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: Replace the Air Filter and Check Vents
What You'll Need
- Replacement air filter (correct size for your system) 🛒 Find at FiltersFast · 🛒 Find at Amazon
- Flashlight
Steps
- Turn off power at the breaker and shut off the gas supply valve Flip the furnace circuit breaker to OFF and turn the gas shutoff valve to the OFF position (perpendicular to the pipe). If you smell gas, leave your home immediately and call your gas company.
- Check and replace the air filter Remove the air filter from the return air duct or furnace filter slot. If it is dirty, clogged, or has not been replaced in the last 1-3 months, install a new filter of the correct size. Ensure the airflow direction arrow on the filter points toward the furnace.
- Verify all supply and return vents are open Walk through every room and ensure all supply registers and return air grilles are fully open. Make sure nothing is blocking them — furniture, rugs, curtains, or boxes placed over vents restrict airflow and cause overheating.
- Allow the furnace to cool down With the power off, wait 5-10 minutes for the blower compartment to cool down. The auxiliary limit switch should reset automatically once the temperature drops. If the power was interrupted during a heating cycle, this may be all that is needed.
- 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 monitor the furnace through a complete heating cycle. The EEd code should clear after the switch resets.
When to Call a Professional
Contact a licensed HVAC technician if:
- Code EEd returns after replacing the filter and ensuring all vents are open
- The blower motor runs slowly, makes grinding noises, or does not start at all
- The EEd code occurs repeatedly even with a clean filter and unobstructed vents
- You had no power interruption and the filter was already clean when the code appeared
- You suspect a blower speed or ductwork sizing issue
Sources
✓ Verified against manufacturer service manual — March 2026