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GE Appliances dishwasher IH / 1H: heater fault

IH / 1H means: Inlet heater fault or temperature too high.

Short answer. The heater circuit is faulty or the water overheated. Let it cool, then it is a heater, thermostat or relay repair.
Part at faultheater and thermostat
Severitymedium
DIY difficultyhard
When it appearsany

How to fix IH / 1H

  1. Cut power and allow 20 minutes to cool.
  2. Reset and run a cycle; if it returns, meter the element and check the high-limit thermostat.
  3. A board relay stuck on is the other cause; replace the board.

When to stop and call a repairer

A heater stuck on is a hazard; do not run the machine unattended with this code.

What it costs

Parts: Element $30 to $60; board $90 to $200.

Service: A home visit from an appliance technician runs $120 to $250 for diagnosis plus the part. Boards are the expensive part; sensors and switches are cheap.

Worth repairing? Depends on which part.

How to check the error log

On most GE dishwashers, hold Start for 5 seconds with the door open to enter the service menu; on models with a hidden display, press Select Cycle and Start together for 5 seconds. The last error shows on the display. Turn power off at the breaker for 60 seconds to reset the board.

Clear the log after a repair so you can tell whether the fault has really gone.

FAQ

What does IH / 1H mean on the GE Appliances dishwasher?

Inlet heater fault or temperature too high. The heater circuit is faulty or the water overheated. Let it cool, then it is a heater, thermostat or relay repair.

Can I fix IH / 1H myself?

DIY difficulty: hard. Cut power and allow 20 minutes to cool. Reset and run a cycle; if it returns, meter the element and check the high-limit thermostat.

How much does it cost to fix IH / 1H?

Element $30 to $60; board $90 to $200. A home visit from an appliance technician runs $120 to $250 for diagnosis plus the part. Boards are the expensive part; sensors and switches are cheap.

Is it worth repairing?

Depends on which part.

Code meanings are compiled from manufacturer service references and repair documentation for the GDT / GDF / GDP / Profile / Cafe; fixes follow documented repairs and owner reports. Model revisions can differ. If your appliance is under warranty, contact the manufacturer before opening it.