F1 Error Code in Whirlpool RB160, RB260, RB270, RB770, RF396, RM765, RM770, RS675, RS696 Series Ovens and Thermador RDDS30, RDF30, RDFS30, RDSS30, RED30, REF30, RES30, RSS30 Series Ovens

This article refers to a specific problem we’ve been encountering with two different types of oven control boards – the relevant model and part numbers can be found at the end of the article.

These control boards can throw F1 error codes in response to a variety of failures.  Often, these error codes are the result of bad power supply or logic control circuits that can be repaired at FixYourBoard.com.  However, we have been finding that even after a control board is rebuilt and passes a full function test, it still throws F1 when reinstalled in the original oven.  How can this be?

Electronic Control Board Rebuilds

Electronic Control Board Rebuilds

It turns out that these control boards connect to the platinum temperature sensing rods through wire nuts.  The connection in the wire nut is going high resistance, which causes the control board to think the oven cavity is over temperature…resulting in an F1 overheat error code.  This connection seems especially susceptible to temperature change as well, so this problem is especially apparent as you start heating the oven.

So, if you’ve had your board rebuilt by FixYourBoard.com or recently got the board replaced, and you’ve replaced the temperature sensor, but you’re still getting an F1, inspect these wire nuts!  The easiest way to find the wire nuts will be to follow the wiring with your hand (make sure the breaker is off) from the temperature sensor (or from the board if you know which wires go to the sensor).

You will likely find that the wiring inside the nut has rusted/corroded.  We recommend you cut off the already exposed portions of the wire and strip some insulation off, allowing “fresh” wire to be reconnected in a new wire nut.

Remember to have all your control board needs handled at FixYourBoard.com!

 

Part Numbers: 14-33-347, 3169256, 3169257, 3169258, 3169259, 486752

Model Numbers: RB160PXB02, RB160PXBB2, RB160PXYB6, RB170PXB02, RB170PXBB, RB170PXBQ2, RB260PBYQ, RB260PXB1, RB260PXBB1, RB260PXBB2, RB260PXBQ, RB260PXBQ1, RB260PXBQ2, RB260PXYB, RB260PXYB0, RB260PXYB1, RB260PXYQ, RB260PXYQ0, RB270PXBB0, RB270PXBB1, RB270PXBO1, RB270PXBQ2, RB270PXY, RB270PXYB, RB270PXYB RB270PXYB-0, RB270PXYB1, RB270PXYQ, RB270PXYQ0, RB270RXBB1, RB760POXYB2, RB760PXB, RB760PXB01, RB760PXBB0, RB760PXBB2, RB760PXBQ, RB760PXYQ, RB770PXBB1, RB770PXBQ1, RB770PXBQ2, RB770PXYB, RB770PXYB5, RDDS30, RDDS30QVB, RDDS30RS, RDDS30RVS, RDDS30V, RDDS30VPS, RDDS30VQ, RDDS30VQB, RDDS30VQS, RDDS30VQW, RDDS30VRS, RDDS30VRS/01, RDDS30VRS/02FD, RDDS30VRS/03SD, RDDS30VRS03, RDDS30VRSFD, RDDS30ZQB, RDF30, RDF30Q, RDF30QB, RDF30QS, RDF30QW, RDF30QW RDF30RS, RDF30RS, RDFS30, RDFS30QS, RDFS30QW, RDFS30RS, RDS30V, RDS530RS, RDSF30RS, RDSS30, RDSS304S, RDSS30Q, RDSS30QB, RDSS30QW, RDSS30QW RDSS30RS, RDSS30RS, RDSS30RS-02, RED30RS01, RED30V, RED30VQB RED30VQBK, RED30VQW, RED30VRS, REF30, REF30QS, REF30RS, RES30QW, RES30RS, RF396PXYN, RF768PXYQ, RFB260PXBQ2, RH770PXBQ2, RM765PXAB0, RM765PXBB2, RM770PXBB1, RM770PXBB2, RM770PXBQ2, RS6755XYN1, RS6755XYW0, RS675PXBQ1, RS675PXBQ2, RS675PXYQ0, RS677PXYQ, RS696B02, RS696PXBB2, RS696PXYB, RS696PXYB0, RS696PXYB2, RS696TXYQ02, RS69PXBB3, RSS30RS, RX260PXYQ01, W305B, WPLRM770PXAB0

Home Diagnostics for Your RDD, RDS, RDF, RED, REF, RES Thermador Oven Range Cooktop Stove

Is your Thermador oven throwing error codes, not heating to set temp., or malfunctioning in other ways?

You may need to have your control board repaired, but the problem could also be failing hardware in your oven.

Luckily, these boards have a built-in diagnostic feature that can tell you where the problem is.  To enter the diagnostic mode, you need to have the breaker to your oven shut off.  Hold down the “Stop Time” button (center button) and have a friend turn the breaker back on.  Until the button is depressed, the control will beep and show the microprocessor ID in blue digits and dashes in red digits.  Once “Stop Time” is depressed, the control will stop beeping and show dashes in both the blue and red digits.

14-33-347,486752

Display shows Microprocessor ID and dashes when you enter Diagnostics Mode.

From here, you can test all the various functions of the oven control.

Holding any of the cooking buttons (Convection, Bake, or Broil) will energize that element relay while the button is held in, and the display will show “ON”.  You should hear a *click* whenever the relay turns on or off.  Depressing the button turns the relay off.

Holding the Clock button will energize the door latch relay and illuminate all display segments.

Holding the Stop Time button will cause the board to beep and show the same screen as when you entered Diagnostics: 4 digit Microprocessor ID and dashes.

Holding the Cook Time Button will show the  EEPROM checksum in blue digits and the current oven sensor temperature in red.

Holding the Timer button will cause the control board to beep.

Holding the Clean button will reveal the current state of the door latch.  Depending on which revision of the control board you have, there are 4 possible conditions, represented by either numbers 0-3 or 4-7…

  • 0 or 4: Latch in transition between states. Unlock Switch 1 and Lock Switch 2 are both open.
  • 1 or 5: Fully Latched (door closed). Unlock Switch 1 is open and Lock Switch 2 is closed.
  • 2 or 6: Fully Unlatched. Unlock Switch 1 is closed and Lock Switch 2 is open.
  • 3 or 7: Invalid Latch State. Unlock Switch 1 and Lock Switch 2 are both closed.

Pressing Cancel/Clear/Off will exit the Diagnostic Mode.

 

 

So, this is a powerful troubleshooting tool.  For example, if your oven isn’t heating properly, use diagnostic mode to figure out which element isn’t heating.  Hold Bake, you should hear the Bake relay click, and the Bake element (bottom) should heat as long as the button is held in.  If you hear the click, but there’s no heat, check the wiring to the element and the element itself (hardware specs below).  If the hardware is good, then the control board needs to be sent in for repair.  Even if the relay clicks, it can still have bad contacts.

Or, perhaps the oven isn’t heating properly because there is a failure in the temperature sensing circuit.  Hold the Cook Time button to reveal the oven sensor temperature.  If the oven has been idling at room temperature, then the red digits should display something around “070” (70 degrees).  Anything drastically different than this means there is a definite problem.  Check the wiring to the oven sensor and the sensor itself.  If the hardware is good, then the control board needs to be sent in for repair.

There are is a variety of possible failures for these ovens.  Using the diagnostics mode can help you find which circuit is faulty, and then you can use the table below to determine whether it’s a hardware problem or control board problem.

 

DANGER HIGH VOLTAGE!  You do not need power to the oven to make these measurements. Please cut the breaker.

HARDWARE TERMINALS RESULT
Bake Element E6** 18-26 Ω
Broil Element E7** 12-20 Ω
Convection Motor E2 to E8 55-80 Ω
Latch Motor E2 to E5 835-870 Ω
Temperature Sensor J1: pins 3 to 5 ~1080 Ω at Room Temp

**NOTE: The motors and sensor checks test the hardware and relevant wiring simultaneously.  There’s no good way to test the heating elements and their wiring at the same time.  Check the resistance of the elements at the ends of the element, and then individually inspect the wires from the ends of the elements.

 

This troubleshooting guide applies to the following Part and Model numbers…

P/N: 14-33-347, 35-00-571, 35-00-751, 486752, 487604

M/N: RDSS30, RDDS30V, RDFS30, RDDS30VQB, RDF30, RDF30QW, RED30V, RDDS30VRS, RDDS30VQB, RDDS30, RDF30RS, RDDS30QW, RES30, REF30QW, RES30QB, RDF30QB, RED30VQRS, REF30QB, RES30RS, RDF30RS, RED30VQB, RED30VQRS, RED30VQW, REF30QB, REF30QW, REF30RS, RES30QB, RES30W

Unscramble Codes E1,E2,E3,E4,E5,E6,E7,E8,E9,E10,E11,E12,E13,E14,E15 For Thermador CT127, CT130, CT230 Models

The most common codes we see at www.fixyourboard.com are E3,E4, E10,  but here is the full list for CT127, CT130, CT230, CMT22 models:

Does your Thermador Controller look like this?  Below is the full list of codes and the meaning according to Thermador:

ERC_CT127_CT130_CT230

ERC For CT127_CT130_CT230

Error Code:     E1
Cause:     Control Board
Example:     Disables clean in both ovens; allow cooking
Corrective Action:     Replace control board

Error Code:     E2
Cause:     Sensor or Control Board
Example:     Oven temp over 625F or clean temp over 890F
Corrective Action:     Check sensor

Error Code:     E3
Cause:     Open Sensor
Example:     Disables cooking in affected oven
Corrective Action:     Check sensor

Error Code:     E4
Cause:     Shorted sensor
Example:     Disables cooking in affected oven
Corrective Action:     Check sensor

Error Code:     E5
Cause:     Control Board
Example:     Disables clean in both ovens; cooking useable
Corrective Action:     Replace control board

Error Code:     E6
Cause:     Selector Switch
Example:     Disables individual cook modes in affected oven
Corrective Action:     Check all functions; replace selector switch if one-piece Dreefs; replace control board

Error Code:     E7
Cause:     Control Board
Example:     Remains in display; oven unusable
Corrective Action:     Replace control board

Error Code:     E8
Cause:     Control Board
Example:     Remains in display; oven unusable
Corrective Action:     Replace control board

Error Code:     E9
Cause:     Latch
Example:     Latch motor may run but switches do not cycle
Corrective Action:     Replace latch in affected oven

Error Code:     E10
Cause:     Control Board
Example:     Checksum error
Corrective Action:     Replace Dreefs board

Error Code:     E11
Cause:     Latch Problem
Example:     Will not clean
Corrective Action:     Replace latch in affected oven

Error Code:     E12
Cause:     Latch Problem
Example:     Will not clean
Corrective Action:     Replace latch in affected oven

Error Code:     E13
Cause:     Latch Problem
Example:     Latch does not run
Corrective Action:     Check for voltage to latch motor

Error Code:     E14
Cause:     Latch Problem
Example:     Loose latch switch
Corrective Action:     Check latch for proper operation

Error Code:     E15
Cause:     Control Board
Example:     Remains in display; oven unusable
Corrective Action:     Replace Dreefs board

The common parts and models that we see at www.fixyourboard.com are:

Parts: 368743, 369171, 431481, 35-00-536, 35-00-459

Models: CT127N01, CT127NPRS, CT130-03,  CT130S-03, CT227N01 CT23003, CT227NPRS, CT130S-03, CMT22NPRS

Meaning of F1,F2,F3,F4,F5,F6,F7 codes for Garland/Manitowoc Ovens

Garland oven controllers are programmed to give meaningful information if they enter into a fault condition.  This applies to most Garland ovens such as models: UCO-G-5, ECO-G-10, ECO-G-20, ICO-G-10, ICO-G-20, IC0-E-10 , ICO-E-20, ECO-E-10, ECO-E-20,MP-ES, MP-ED, MP-GS, MP-GD, PaceSetter EC-I-36, EC-II-36, EC-I-42, EC-II-42, GC-I-36,GC-II-36,GC-I-42,GC-II-42, Trendsetter ovens TE3, TE4, TTE3, TTE4, TE3/4-x, TTE3/4-X, TE3/4ECH, TTE3/4ECH, TG2A, TG3,TG4,TTG3,TTG4, Sunfire SDG-1 and SGD-2, TE2A, KFC MCO-G-5K and others.

Many times the result of the F code troubleshooting points to the control board /Timer/ERC.  Don’t worry, they can be rebuilt even if the part is no longer available (NLA) or obsolete.  With www.garland.fixyourboard.com , you will never have to scrap a commercial oven due to failed electronics.

Some part numbers that throw F-codes are: 1517700, 1517701, 1517702, 1517703,1544800, 1517704,1517705, 1517706, 1517710 ,1544801, 1933801, 1933701,4521705,4521282, 4515873, 1025299, 1025204,1034199, 1244705, 1285601, 1025204, 1244704, 1285700, 1905701, 1025204,1244705, 1905601 among others.

Here is a summary of the fault codes and their meaning:

F1Relay Output is Enabled When Not Cooking. The cook relay is closed with no call for heat.
-Control should be rebuilt.

F2 Over Temperature Alarm. The control is sensing an oven temperature 50 degrees or more above the
maximum temperature of 500F
.
-Check the probe wiring and the probes resistance  and replace if faulty
-If probe is functional, rebuild control.

F3Open Probe Circuit. The control is sensing an open circuit at the probe input.

-Check the probe wiring and the probes resistance and replace if faulty.

-If probe is functional, rebuild control.

F4Shorted Probe Circuit. The control is sensing a short circuit at the probe.
-Check the probe wiring and the probes resistance and replace if faulty
-If probe is functional, rebuild control.

F5Relay outputs not enabled when cooking. The control is in cook mode and the heat relay is not closing.
-The control should be rebuilt

F6No 60Hz input. The control does not sense the input power.
-Check the power supply for noise
-If the supply is correct, rebuild control.

F7 EEPROM. The control has detected that the calculated EEPROM check sum is incorrect.

-Reset power to control and if problem persists, rebuild control.