True P2: the Dixell coil probe has failed
Probe 2 on True's Dixell units is the defrost probe clipped to the evaporator coil.
Mon–Sat, 8am–8pm
- Sensors and probes
- Commercial controls and board repair
- Source: True Residential
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What P2
actually means.
Probe 2 on True's Dixell units is the defrost probe clipped to the evaporator coil. The control uses it to end defrost and to manage the fans after defrost. With P2 showing, defrost falls back on timing, so ice can build on the coil over the following days.
True Residential commercial appliance display
What to do when P2 shows on the commercial applianceKind of codeSensors and probes
A probe is handing the controller a reading it cannot trust, or none at all: a box or coil sensor torn loose from its clip, a fryer probe coated in carbon from oil left too long between filterings, a combi core probe with a kinked cable, or a connector gone green from steam and cleaning chemicals. The unit then runs on, stops, or shuts the heat or the cooling off to protect itself. Letting it cool and restarting it as the manual describes is fair; a probe that still reads wrong sits behind a panel, and that is a visit.
Usually leads toCommercial controls and board repair
Controllers, touch panels, relays, contactors and interlocks tested, and replaced only when the evidence says so.
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.
MakeTrue Residential
A True cooler or prep station in a restaurant is looked at once the kitchen confirms where the held food is sitting for now.
SourceTrue Commercial Refrigeration General Control Guide, P#811072, rev. C (09/2025)
Listed in the Dixell display code table of True's general control guide (rev. C, 2025), which names p2 as the defrost (coil) probe.
Before you book,
in this order.
Each step comes from True Residential's own guidance for P2 on its commercial appliances. Follow it to the end: the last card says whether this is a visit.
Write down when P2 appeared and keep checking food temperatures on your log.
Look at the coil area through the grille for heavy white frost; if it is building, the unit may need a manual defrost soon.
Book a visit so the probe can be measured before the coil ices over.
Still there?
It usually turns into commercial controls and board repair. Book with the code and the model number.
What not to do
P2 is not the thermostat probe; P1 is. A cabinet with P2 often still holds temperature for a while, which is why it gets ignored until the coil freezes.
What you may
notice with it.
The commercial appliance problems P2 tends to arrive with. Answer these at the commercial appliance before anyone is booked.
All problems
Where P2 usually leads
Commercial controls and board repair.
True Residential
commercial appliances.
A True cooler or prep station in a restaurant is looked at once the kitchen confirms where the held food is sitting for now.
True Residential commercial appliance repairMore True Residential codes
All 14 True Residential codesSensors and probes 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 True Residential's own words
P2 Evaporator probe failure
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Listed in the Dixell display code table of True's general control guide (rev. C, 2025), which names p2 as the defrost (coil) probe.
True Residential P2 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 P2.
Can I clear P2 myself?
Why is my True still cold with P2 showing?
Can I ignore P2 on a True until the next PM visit?
Is P3 the same as P2 on a True?
Back to your everyday
Still showing P2?
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.