Wolf M Series wall oven
showing 2420
2420 is logged when the relay board of an M Series oven sees something wrong in the RTD circuit, the resistance-type sensor the oven reads to hold its set temperature.
Mon–Sat, 8am–8pm
- Temperature sensor
- Temperature sensor and calibration
- Source: Wolf
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What 2420
actually means.
2420 is logged when the relay board of an M Series oven sees something wrong in the RTD circuit, the resistance-type sensor the oven reads to hold its set temperature. Until that reading is trusted, the control cannot regulate heat properly.
Wolf oven display
What to do when 2420 shows on the ovenKind of codeTemperature sensor
The reading from the temperature probe fell outside what the control will trust, or climbed far higher than the setting. A loose connector or a probe that has drifted is ruled out before the control itself, and a reading that runs away means the breaker goes off first.
Usually leads toTemperature sensor and calibration
Baking that comes out burnt or pale at the usual setting, traced to the sensor, its wiring or an oven that simply needs calibrating.
Shows up asOven Temperature Not Accurate
Recipes come out burnt or underdone at the right setting, and an oven thermometer reads far from the dial.
MakeWolf
The cooking brand of the Wisconsin-based Sub-Zero Group, making wall ovens, convection steam ovens and speed ovens.
SourceWolf answer: M Series oven, relay board RTD circuit (2420)
Wolf M Series wall ovens.
Before you book,
in this order.
Each step comes from Wolf's own guidance for 2420 on its ovens. Follow it to the end: the last card says whether this is a visit.
Switch the oven's breaker off for about 30 seconds, turn it back on and run the oven again.
If 2420 returns, do not rely on the oven for cooking that needs an accurate temperature; book a visit.
Still there?
It usually turns into temperature sensor and calibration. Book with the code and the model number.
What not to do
2420 is not a sign that the oven merely runs a few degrees hot or cold. It reports a circuit problem, and a small calibration offset in the settings will not clear it.
What you may
notice with it.
The oven problems 2420 tends to arrive with. Answer these at the oven before anyone is booked.
All problems
Oven Temperature Not Accurate
5 causes, cheapest first
Where 2420 usually leads
Temperature sensor and calibration.
Wolf
ovens.
The cooking brand of the Wisconsin-based Sub-Zero Group, making wall ovens, convection steam ovens and speed ovens.
Wolf oven repairMore Wolf codes
Temperature sensor on other makes
Single wall oven
One oven cavity set into a cabinet at chest height, with its own controls above the door and nothing to cook on above it.
Double wall oven
Two full oven cavities stacked in one tall cabinet, sharing one control panel and one power supply but heating on their own.
Steam oven
A built-in oven that adds water vapor to the cavity, alone or with convection heat, fed from a tank or a water line.
In Wolf's own words
Cause: Relay board RTD circuit fault
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Wolf M Series wall ovens.
Wolf 2420 oven 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 2420.
Can I clear 2420 myself?
Will adjusting the temperature offset fix 2420 on my Wolf?
Is it safe to cook while my Wolf oven keeps showing 2420?
Back to your everyday
Still showing 2420?
Book with the code exactly as shown, the full model number, and whether you can smell gas or burning — with a code, that is where the diagnosis starts.