The short answer
F73 tells you the condensate drain port in the pan is blocked. A heat-pump water heater pulls heat out of room air and, in doing so, condenses moisture out of it, so it produces water continuously while the compressor runs. With the port blocked that water has nowhere to go but the pan, and from there the floor. It is one of the few codes on this appliance an owner can usually clear completely.
GE water heater code as the manufacturer publishes it
Reference| Code | Meaning |
|---|---|
| F73 | Condensate drain pan port clogged. |
What you observe alongside the code
- Water in the pan or on the floor around the base — The whole point of the code.
- The heater running on elements instead of the heat pump — The control protecting itself, and your bills rising quietly.
- A damp, musty smell near the unit — Standing condensate in the pan.
- It appears in humid weather and not in winter — Condensate production follows room humidity.
What triggers it, most likely first
- Lint and dust silting the drain port — First: the port sits where airborne fluff from a laundry room lands, and it needs very little to close.
- A kinked, sagging or blocked condensate hose — Second: the hose is flexible and takes a set, and a sag holds water that then grows a biofilm.
- A condensate line run uphill or into a blocked floor drain — Third: gravity drainage that does not fall all the way cannot work, however clean the port is.
- Biological growth in the pan and port — Last: slime in a warm damp pan closes a clean port again within weeks if the pan is not cleaned too.
Check in this order, and why
- Look in the pan for standing water — Confirms the code and shows how long it has been building.
- Find the port and check whether water moves when you pour some in — The direct test, and it needs nothing but a cup.
- Follow the condensate hose for sags and kinks — A visual check that explains many repeat blockages.
- Check the floor drain or condensate pump at the far end — Last, because it is outside the appliance.
Clearing the code, then the owner-safe checks
- Sponge the pan dry and look for the drain port — Working dry makes the port obvious.
Tools: sponge, flashlightAbout 15 min
- Clear the port gently with a soft brush and flush it with water — Do not push anything rigid into the port; you will move the blockage further in.
Tools: brush, cupAbout 20 min
- Clean the pan itself, not only the port — Biofilm left in the pan reblocks a clear port in weeks.
Tools: clothAbout 15 min
- Reposition the condensate hose so it falls the whole way — Take the sags out and support it; gravity does the rest.
Tools: flashlightAbout 20 min
Before you open anything
Safety
Switch the water heater off at its breaker before removing any cover — a capacitor can hold a charge after the power is off, and the element terminals sit behind the access plates. A hybrid model also carries a sealed refrigerant circuit: nothing on it may be opened, brazed or vented by anyone but a licensed technician. Water leaving this appliance can scald, so give the tank time to cool before draining it.
When this code is a service call
Call when the port and hose are clear, the pan is clean, and the code returns — that points at the pan sensor or a drain route that cannot work by gravity and needs a condensate pump. Call sooner if water has reached a finished floor or anything electrical, because the water damage outruns the appliance fault.
Neighbouring GE water heater codes
Which model lines this reading applies to
This reading of F73 applies to GE hybrid and heat-pump electric water heaters with the digital control panel that publishes lettered fault codes. A conventional electric tank with a simple thermostat has no display and cannot produce it, and a gas model uses an entirely separate diagnostic scheme. Pan and port geometry differ between hybrid generations, and some models drain through a pump rather than by gravity.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
