Error code reference

Aprilaire HVAC Error Code E7

Float Switch Open: The Float Switch input to the User Interface Assembly is open, caused by water in the secondary drain pan activating the float switch, a faulty float switch, incorrect switch type, or a missing/improperly seated jumper.

SourceAprilaire Dehumidifier - Service Manual: Models 1830, 1850, 1870p. 8

Aprilaire codes Aprilaire hvac codes

Diagnostic procedure

The full E7 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Leave the unit ON; it will self-correct. If a float switch is installed, drain any water out of the secondary drain pan and inspect the terminal block for proper wire seating.

SourceAprilaire Dehumidifier - Service Manual: Models 1830, 1850, 1870p. 8

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Where this code is documented

2 manuals in the MyPros+ library document this code for Aprilaire hvac.

Models covered by the manuals that document this code

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The full E7 procedure

Where this code is documented

Models covered by the manuals that document this code

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