Bosch refrigerator and freezer issues can create major problems and may even lead to food loss. It is essential to resolve the issue immediately if you notice that your Bosch freezer or refrigerator stops keeping food at the correct temperature. Fortunately, many common issues that cause freezers and refrigerators to become warm are easily fixed with a few simple troubleshooting steps. In this article, we’ll look at the most frequent causes for warm Bosch refrigerators and freezers and provide step-by-step instructions to fix these issues. We can help you get your freezer and refrigerator back at the right temperature, regardless of whether you’re an expert DIYer or newbie.
Cold Control or Temperature Control
The cold control is a temperature-controlled switch that supplies power to the compressor and fan circuits in the refrigerator. If the compressor and fan circuits are functioning normally, but not running regularly or for long enough to keep the appropriate temperatures in the fresh food and freezer sections the cold control may be defective or may be out of calibration. The standard fresh food temperature should be 38 degrees F and the control is set to the midpoint. Verify that the sensor or capillary tube is in good shape and the wire’s terminals do not become loose or corroded.
Before you begin, unplug the plug of your Bosch refrigerator. After that, you should unlock the Bosch refrigerator’s doors, and then locate the control. It’s hidden behind the knob for temperature adjustment and is typically located in the fresh food section of the control panel.
After removing the control from the appliance, turn the control to the warmest setting. set your multi-meter to the Rx1 setting , and touch the probes to the terminals
You’re testing for continuity. You should be able to read infinity. When the probes remain on the terminals, you can adjust the control to higher (colder) and higher settings. If your reading shifts to zero, this means that you have continuity.
If your control fails one of the above tests then you’ll need a replacement Bosch cold and temperature control.
Motor for Evaporator Fan
When the compressor is on When the compressor is running, it is the Bosch fan motor moves the cool air through the refrigerator. If the fan’s condition is poor it will mean that temperatures in the freezer section will rise gradually, while temperatures in the fresh food section will rise faster and the compressor may run for longer and more often than it normally does. While the compressor is running, you will also detect the evaporator fan operating at the same time, and the condenser fans that are close to the compressor.
How to inspect a Bosch refrigerator evaporator fan motor:
Disconnect the Bosch refrigerator from the source of power and take off the cover for the evaporator fan that is located in the freezer compartment.
The motor shaft must turn without resistance. try turning the shaft manually in order to test whether there is resistance.
If you find a lot of the motor is covered in ice, it is best to open the freezer and defrost it to see if it resolves the issue. You should also inspect the motor for any indications of wear or damage.
If it is not turning easily, or if it is obvious that it is worn, you will require a replacement Bosch evaporator fan motor.
Electronic Control Board
An electronic control board may be installed on certain Bosch refrigerators. Thermistors , also known as temperature sensors, are connected to the control board, and they are used to monitor temperatures in the freezer and fresh food compartments. The control board makes use of this information to regulate the performance of the compressor motor, fan motors, and the defrost system. If the temperatures are too hot, the electronic control is at fault. The electronic controls of Bosch are costly, complex and, in most cases, trustworthy. Before you criticize the control, make sure that the fans, compressors and sensors are working correctly. Manufacturers may have specific information that can help you diagnose an issue with your control.
How do you check the electronic control board:
Unplug the fridge prior to beginning since you’ll be working with electrical components.
Locate the electronic control panel and remove it from the appliance. It’s located inside the Bosch refrigerator. The control box is attached to the top of the fridge.
Look over your control panel for signs of damage, such as burnt, wear connections or arcing.
If you notice one of these you’ll need a replacement electronic control board for Bosch.
Temperature Sensor or Thermistor
In models that use Electronic Control, or an Electronic Control, a thermistor or temperature sensor might be used to check fresh food and freezer temperatures. This sensor is small and has the shape of a capsule. It is covered with an opaque plastic shield. The temperature affects the resistance. This information is used by the control board to control the damper control, and activate fan circuits as well as compressors. If a sensor gets damaged or defective it may in error signal the controller to turn off the compressor and fan which could result in higher than normal fresh food and freezer temperatures. The individual manufacturers might have specific information to test these sensors, depending on the model involved and could also include an error code for the electronic control board for certain models.
How to test the temperature sensor in refrigerators using a multimeter:
Start by unplugging the Bosch refrigerator. Next, you need to remove the back panel to reveal the main control board.
The thermistor(s) will be connected to the main control board. Unplug the thermistor(s) from the appliance in order to test them.
It is necessary to check them by placing the thermometer(s) in the ice bath for 5 minutes to raise the temperature to 32°F.
You should get a reading of 16,600 Ohms 5 Percent if you have the probes on the terminals of your device and your multimeter is set to Rx1.
You’ll require a replacement Bosch temperature sensor/thermistor if you get an error reading outside of this range.
The defrost timer is an electro-mechanical timer that operates a set of contacts which control the compressor circuit as well as the heater circuit for defrost. Most timers start defrost cycles every 8-10 hours of compressor run time. This normally occurs about once every two days or. The defrost timer can stop the cycle within 20-30 minutes. After that, the compressor and fans will restart.
How do you test the timer for refrigerator defrost by using a multimeter
Find the defrost timer you need by disconnecting the appliance from its source of power. You can find it under the lower kickplate of the refrigerator or on the control panel on the Bosch refrigerator. It could also be on the refrigerator’s back wall.
After locating it, remove the defrost timer from the appliance so that you can verify it.
Make use of a multimeter that has the Rx1 setting. One probe should touch the common terminal. (It should be marked with either “3” or”C”). The second lead should touch the remaining three terminals one at a time. Test the first pair and result in a reading of or close to zero indicating continuity. A reading that is zero or near zero can also be read by the second pair. The third terminal could produce a reading of infinity.
If you don’t get these readings, you will need an replacement timer from Bosch.
Thermostats that Defrost
The Bosch defrost thermostat functions as an safety thermostat that runs in series with the defrost heater . It is used to stop the defrost process at the point that the evaporator is reaching a specific temperature, usually set at between 38 and 47 deg Fahrenheit. If the thermostat is defective and remains in open circuit then the defrost heater is not energized, and defrosting won’t occur.
How do I test the thermostat of a refrigerator’s defrost using a multi-meter
Unplug your Bosch refrigerator, and then locate your refrigerator’s thermostat for defrost. In models that have a freezer on top, it may be located beneath the floor of the refrigerator, or it could be situated at the rear of the freezer. The thermostat for defrost is located on the back of a side-by side refrigerator.
When you’ve located it remove it and try it. You must remove all objects in your way such as the contents of the freezer, freezer shelves, icemaker parts, and the back, rear, or bottom panel.
Your multimeter should be set to Rx1. Each probe should be positioned on an electrical wire for your thermostat. If the thermostat is at its lowest, the multi-meter should read zero. If the temperature is warmer (anywhere between forty and ninety degrees Fahrenheit) the test will give you a value of infinity.
If the results you receive from your test are different from the results presented here Then you’ll require a replacement thermostat from Bosch..
The defrost heater is the appliance that melts the ice and frost from the evaporator coils. It’s usually a wire filament enclosed in an aluminum or glass tube. There may be more than one heating element, based on the form of the evaporator.
How do you test a defrost heating element in your refrigerator using a multi-meter
Verify that you have disconnected your appliance from its electrical source before you begin.
Locate your defrost heater. You will find it behind the freezer compartment in your Bosch refrigerator or under the floor. Defrost heaters are typically placed beneath the evaporator coils in refrigerators. You must remove all objects blocking your path, such as the contents of the freezer, freezer shelves, icemaker parts, and the back, rear or bottom panel.
Before you are able to test the defrost of your heater, you need to take it out of your refrigerator. A defrost heating unit is connected by two wires, and these wires are connected by slip-on connectors. Take the connectors in your sturdy grip and take them from the terminals. To help you in this process, you may have to employ a pair or needle-nosed scissors. Be careful not to pull on the wires themselves.
Multi-meters can be used to test the continuity of the heater. Set your multimeter to the Rx1 scale, and then place the tester’s leads on one terminal each. The reading should be anywhere between zero and infinite.
If you get a reading that is zero or even infinity, you’ll need an replacement Bosch defrost heater.
Condenser Fan Motor
Modern frost-free Bosch refrigerators feature condenser coils which are fan-cooled. It’s usually situated in the lower part of the refrigerator close to the compressor. In order to remove heat, the condenser fans circulates air around the coil. If the Bosch refrigerator is heating up more than normal and the compressor is running almost continuously, then you may have an issue with the motor for the condenser. The condenser motor is running at the same time as the motor for the evaporator and the compressor. The compressor will continue to function almost constantly if the fan motor ceases to turn.
How to check the condenser motor in a refrigerator:
Start by disconnecting your Bosch refrigerator off of the power source and then remove the rear access panel to find the condenser fan motor. It is typically located at the bottom of the rear of the refrigerator.
Once you’ve found it, inspect the fan for obstructions or any other obstructions that may be stopping it from moving freely. You must also examine the condenser fan motor for any indications of wear or damage..
If the fan motor has become seized or worn and worn, you’ll require a Bosch replacement condenser motor.
In the end an Bosch refrigerator or freezer that are too hot can be a frustrating and expensive issue. If you are able to do a little troubleshooting and some basic repair knowledge, many of the most common reasons for hot refrigerators and freezers can be dealt with swiftly and effectively. There are a variety of steps you can take to ensure that you have a cooling source for your appliance, from examining the temperature settings to cleaning the coils. You can cut costs and ensure that food remains fresh and safe by following these tips. Remember, if you’re ever unsure about a repair, you should always consult with a professional technician to ensure the work is completed safely and effectively.