Delfield dEF: a defrost is running or the unit is recovering
Delfield's R290 units go straight into a defrost when they are first powered or switched back on, and the display reads dEF until that cycle ends and for up to 30 more minutes while the box cools.
Mon–Sat, 8am–8pm
- Mode, not a failure
- No repair needed
- Source: Delfield
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or call (844) 571-4566
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What dEF
actually means.
Delfield's R290 units go straight into a defrost when they are first powered or switched back on, and the display reads dEF until that cycle ends and for up to 30 more minutes while the box cools. Low-temperature cabinets also defrost after seven hours of total compressor running, or sooner if the coil gets very cold.
Delfield commercial appliance display
What to do when dEF shows on the commercial applianceKind of codeMode, not a failure
Nothing on the unit has broken; the controller is reporting a state it chose or one somebody set. A defrost pauses cooling for a scheduled melt and shows a warmer air reading for a while, a combi asks for a delime or runs its clean cycle and locks the door until it ends, a dish machine or a laundry machine sits in energy save between busy periods, and a door-open reminder beeps after a long delivery. No part is needed: letting the cycle finish, or the key sequence in the manual, brings the unit back.
Usually leads toNo repair
Leave the unit running; do not unplug it again, since that starts another defrost.
Shows up asCommercial Appliance Error Code on a Combi, Fryer, Dish Machine or Laundry Display
A commercial appliance error code appears as letters or numbers on a combi, fryer, reach-in controller, dish machine or laundry machine display, or as a flashing light or an alarm tone.
MakeDelfield
For a Delfield station that runs warm by late lunch, we time the visit to a slow hour so the pans can come out and the rail can be tested empty.
SourceDelfield 6000XL and 6100XL Series reach-ins, installation, operation and maintenance manual, part 9294254 (archived copy of the delfield.com PDF)
Listed in the operation and indication table of Delfield's R290 reach-in manual (6000XL/6100XL) and prep table manual (4400/4500 Series).
Before you book,
in this order.
Each step comes from Delfield's own guidance for dEF on its commercial appliances. Follow it to the end: the last card says whether this is a visit.
Leave the unit running; do not unplug it again, since that starts another defrost.
Give it up to an hour after start-up before judging the temperature.
If dEF never clears or the cabinet warms steadily, book a visit.
Cleared?
The code is gone from the controller, the box pulls down to its set point and holds it, the vat or the cavity reaches temperature and recovers on schedule, the rinse hits its heat and the drum finishes its spin, all without a new part. If the same code comes back within a week, or during the next busy shift, mention it when you book.
What not to do
dEF is not an alarm. A display stuck on dEF for hours with a warming cabinet is a separate problem, usually a defrost part or the control.
What you may
notice with it.
The commercial appliance problems dEF tends to arrive with. Answer these at the commercial appliance before anyone is booked.
All problems
No repair indicated
Nothing to repair.
Nothing on the unit has broken; the controller is reporting a state it chose or one somebody set. A defrost pauses cooling for a scheduled melt and shows a warmer air reading for a while, a combi asks for a delime or runs its clean cycle and locks the door until it ends, a dish machine or a laundry machine sits in energy save between busy periods, and a door-open reminder beeps after a long delivery. No part is needed: letting the cycle finish, or the key sequence in the manual, brings the unit back.
Delfield
commercial appliances.
For a Delfield station that runs warm by late lunch, we time the visit to a slow hour so the pans can come out and the rail can be tested empty.
Delfield commercial appliance repairMore Delfield codes
Mode, not a failure on other makes
Commercial cold storage
Reach-in and pass-through cabinets, walk-in coolers and walk-in freezers, prep and sandwich tables, undercounter units and blast chillers that hold a kitchen's food at safe temperatures.
Commercial cooking equipment
Fryers, griddles, charbroilers, restaurant ranges, convection and combi ovens, steamers, kettles, holding cabinets and toasters, on gas or electric, that make up the hot side of a kitchen line.
In Delfield's own words
The display will continue to read dEF for an additional 30 minutes while the cooling cycle cools the box to the set temperature.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed in the operation and indication table of Delfield's R290 reach-in manual (6000XL/6100XL) and prep table manual (4400/4500 Series).
Delfield dEF commercial appliance repair,
where we come out.
The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered.
All service areasTampa BayFL · 31 areas
Miami / South FloridaFL · 47 areas
New York MetroNY · 75 areas
HoustonTX · 36 areas
ChicagoIL · 50 areas
Los AngelesCA · 95 areas
San DiegoCA · 31 areas
Questions
about dEF.
Can I clear dEF myself?
Why does my Delfield say dEF every time I plug it in?
How long does a Delfield defrost last?
Can I start a defrost on my Delfield by hand?
Back to your everyday
Still showing dEF?
A booking with a code goes further when it has the code as shown, the model and serial from the data plate, and a word on whether the unit still holds temperature, heats, rinses or spins. With those three, the office can match the likely part to your unit the same day.