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Amana EE3: Primary limit circuit is open

Source: Amana manual (PDF) (opens in a new tab) ↗ · Updated

Status codeEE3Amana
What does Amana EE3 mean?

Primary limit circuit is open. The chart lists insufficient air over the heat exchanger.

Homeowner part this code names: furnace air filter.

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Call a pro: jump to when to call a pro Equipment type: furnace
How it shows: 7-segment display on a *CVC96 or *MVC96 two-stage furnace covered by IOG-2015L, including Amana AMVC96 and ACVC96: EE3. The circulator blower runs continuously and there is no furnace operation

Amana EE3 means the primary limit is open. The circulator runs continuously and there is no heat. The chart names blocked filters, restrictive ducts, blower speed or a failed blower motor, and loose high-limit wiring. Check the filter with the power off. EEd is the auxiliary limit in the blower compartment, a different switch with its own filter sentence. EE3 is the primary limit.

Likely causes

  • Blocked filters
  • Restrictive ductwork
  • Improper circulator blower speed or a failed circulator blower motor
  • Loose or improperly connected wiring in the high limit circuit

Safe checks for EE3

  1. With the furnace switched off, check the filter and replace it if it is blocked. Open supply and return registers that are shut
  2. Techniciancheck circulator blower speed and performance, and the high limit circuit wiring
Safety firstIf you smell gas, do not touch any electrical switch or use a phone in the building; leave immediately and call your gas supplier from outside. Turn off electrical power at the furnace switch or breaker before opening any panel, and never bypass or jumper a limit, rollout or pressure switch. Gas valve, burner, venting, wiring and control-board work should be done by a licensed HVAC technician.

Capacitors can hold a charge after the power is off. Safety terms.

When to call a pro

Call a licensed HVAC technician if EE3 returns after the filter is clean and the registers are open.

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Parts & tools for this fix

Taken from this code's causes or steps. A search link opens Amazon results and does not confirm a fit. Check the model number in the manual.

Furnace and AC air filter: guide

In this code: Blocked filters

Filtrete 16x25x1, 4 filtersFiltrete 20x25x1, 4 filtersSearch: Amana furnace air filter

Furnace blower (circulator) motor: guide

In this code: Improper circulator blower speed or a failed circulator blower motor

This one is for a technician to test or replace, so we only explain it and do not link to buy it.

High limit and rollout switches: guide

In this code: Loose or improperly connected wiring in the high limit circuit

A safety device: we explain it but do not link to buy one.

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