Hisense refrigerator error codes: most of them are a sensor, the freezer fan, or the ice maker.

The sensor that reads the fresh-food section is open or shorted. The control runs the fridge on a guess until it is replaced; the code shows in the fridge display.

1. The five-minute unplug and the four-minute watch — a sensor code that does not come back was a power blip.
2. A thermometer in a glass of water on the middle shelf reads 37–40°F after a day; warmer, and the control is guessing wrong.

An E1 that returns is the fridge sensor or its connector behind the back panel of the fresh-food section — a part a technician replaces. The refrigerator runs meanwhile; keep an eye on the thermometer.

The sensor that reads the freezer is open or shorted; the code shows in the freezer display. The control runs the freezer on a guess until it is replaced.

1. The five-minute unplug and the four-minute watch.
2. A thermometer between two frozen packages reads 0°F after a day; ice cream going soft is the freezer running warm on the guess.

An E3 that returns is the freezer sensor or its connector behind the freezer's back panel — a technician's job. Move the frozen food to a cooler if the freezer softens before the visit.

The sensor on the freezer coil that tells the control the defrost has finished is open or shorted. Without it the defrost cannot run right and the coil ices over; the code shows in the freezer display.

1. The five-minute unplug and the four-minute watch.
2. Frost thick on the freezer's back panel, a hum and a scrape from behind it, and a freezer warming slowly over a week fit this code.

An E4 that returns is the defrost sensor behind the freezer's back panel — a technician's job. A 24-hour thaw with everything out (unplugged, doors open, towels down) holds it over; it is not the fix.

The sensor that reads the air around the refrigerator is open or shorted; the code shows in the fridge display. The control uses it to pace the compressor; the box keeps cooling without it.

1. The five-minute unplug and the four-minute watch. The refrigerator is in a room between 50°F and 100°F — a garage in January or a porch in July is outside what the control expects.

An E0 that returns is the ambient sensor near the main board at the bottom back — a part, a technician's. The food is safe meanwhile.

The sensor that reads the moisture in the fresh-food section is open or shorted; the code shows in the fridge display. The crisper control runs on a guess until it is replaced.

1. The five-minute unplug and the four-minute watch.

An E8 that returns is the humidity sensor — a part a technician replaces. The temperatures are not affected.

The sensor that tells the ice maker its tray is frozen is open or shorted; the code shows in the freezer display. No ice is made until it is replaced.

1. The five-minute unplug and the four-minute watch — the ice maker should turn and refill within 24 hours if the code was a blip.

An E9 that returns is the ice maker's sensor — on most models the whole ice maker assembly is the part. A technician's job; the cooling is not affected.

The control sees a door open when it should not — a door standing open, a drawer or a jar holding it off the seal, or a door switch that has stuck. It can show in either display.

1. Shut each door and drawer and feel the gasket all the way round for a gap; move whatever holds it off.
2. The refrigerator is tilted back a hair (0.4–0.6 in at the top) so the doors swing shut on their own — the front feet turn to set it.
3. The light goes off when the door shuts: hold the door switch in with a finger and watch the light. A light that stays on is a switch that is not being pressed, or has failed.
4. Unplug for five minutes and watch the four-minute self-check.

A door that seals clears it. A dr that stands with every door shut and the light going out is the door switch or its magnet in the door — a part a technician replaces.

Not a fault. The lights and the panel work but the compressor is switched off — the mode a store floor uses. The display reads 0F in both halves, or the temperature indicators scroll.

1. The display reads 0F 0F (or the indicators keep moving) and the box is warm with the lights on.

Press and hold the two buttons the book names for the cooling-off mode — Ice On/Off and Energy Saving on most panels — for three seconds until the buzzer sounds three times and the temperatures come back. The compressor starts within a minute.

Not a fault. The filter icon blinks after about 300 gallons on a timer, not on a measurement of the filter.

1. Replace the filter (a quarter turn counterclockwise pulls the old one out; the book names the type), run 2.5 gallons through the dispenser, then press and hold Ice On/Off for three seconds.

The icon stops blinking. A dispenser that drips after a new filter has air in the line — keep flushing it.