Amana
Electric heat limit / sequencer
ProtectStrip overtemp or sequencer failed
A heat-kit limit opened or a sequencer did not bring a bank on. There is no gas-furnace E3 on this machine — this is strip overtemp or a failed sequencer/relay.
Walk Electric heat limit / sequencer in Diagnose
Sign in for the next measurement
First check
1 Is aux actually being requested?
On Amana AVPTC confirm W / E / aux at the indoor control. A heat-pump call with a communicating board that thinks it needs strips is a config / outdoor issue first. IFC electric-heat kW matches the installed kit. Wrong CFM on a 20 kW kit opens limits.
Expect: Aux request present only when it should be.
The rest of the walkthrough is Diagnose.
On the plates
- IFC electric-heat kW matches the installed kit. Wrong CFM on a 20 kW kit opens limits.
- Filter, coil, static. Strips in a brick duct will limit.
- Sequencer / relay 24 VAC from the IFC when Htr is displayed. Open limit on that bank = overtemp, not a ‘bad E3 furnace code.’
- Lugs and element ohms. A failed element is not a control board.