6 DC Millivolts (mV) with room temperature between 68-74. With no power to the unit, take a DC millivolt reading off of terminals 7 and 8 at room temp. Check your thermocouple/temperature probe. You could have a faulty on/off switch and replacing it with Middleby 46521 Switch Kit could solve the problem.ģ. If 9 and 10 are checked with a meter, and it is showing the relay is closed, then it is likely that you will need to replace your temperature controller.Ģ. This can be done by removing the front screw of the temperature controller and looking at the back of the temperature controller at the labeled contacts. With the electrical breaker off and no power to the unit, make sure there aren't any loose strands of wire touching those contacts., make sure there aren't any loose strands of wire touching those contacts. MIDDLEBY's temperature controller's cool-down relay is between contacts 9 and 10. Problem: MIDDLEBY Motor & Fan Burner 27170-0011 continues to run after the oven is cooled down below 200 degreesġ. If the temperature control goes to 909F, then you need to purchase a new temperature control, part numberĤ7321 - Digital Temperature Controller for MIDDLEBY.īe sure to check the MIDDLEBY axial cooling fans are working properly as they are a common culprit of this issue. Pull the plunger/door switch so you can operate with the door being open. If connections are tight and the mV reading is good:ĭisconnect the top terminals 7 and 8 and put a small 18 gauge jumper wire across those two terminals. If this reading isn't correct, you need part number 33984 - Replacement Temperature Probe for MIDDLEBY. Take a DC millivolt reading off of terminals 7 and 8 at room temp. The heat from the wires caused burn marks on the contacts and therefore the contacts need to be cleaned. Loose connection on the top terminals 7 and 8.ģ. There are three causes for the 909F reading:Ģ. This refers to an open/disconnected probe or loose wires on the top terminals 7 and 8. Problem: MIDDLEBY Temperature Controller Reads 909F Error We incorporate any upgrades or refinements that the manufacturer has made since the model was introduced to assure that you have a piece of equipment that will perform like new, and can be easily serviced and supported for many years.Īll remanufactured equipment is tested before leaving our facility to guarantee proper preformance and it backed by a 30 days labor/1 year parts warranty.ALL SUGGESTIONS LISTED BELOW ARE PURELY SUGGESTIONS AND WE RECOMMEND A CERTIFIED TECHNICIAN TO PERFORM SUCH ACTIONS. Remanufactured to the highest standards in the industry, including an exclusive process to return the oven to it’s original factory specifications.

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