Does your Bosch dryer display confusing E17 or E18 error codes? Don’t stress. These codes help pinpoint problems so you can get your dryer running again. An E17 indicates an issue with the internal temperature sensor, while an E18 flags a faulty heating element sensor.
By methodically checking connections, testing parts with a multimeter, and replacing any damaged wires or sensors, you can often resolve these errors yourself. With some simple troubleshooting steps, your Bosch dryer could be back in service in no time.
This guide walks through diagnosing and clearing E17 and E18 faults, avoiding overheating hazards, and resetting error codes so you can feel empowered to tackle dryer issues.
What is an E17 Error Code?
The E17 error code means there is a problem with the NTC temperature sensor behind the lint screen (called R3). This sensor measures how hot the air is. The control board is not getting the right resistance readings from the R3 sensor. Resistance tells us how much something resists electricity flow.
What Causes the E17 Error
There are a few possible causes of the E17 error:
- The wire connection to the R3 sensor could be damaged or loose. This would stop electricity flow.
- The R3 sensor itself might be broken and need replacing.
- There may be a poor connection where the R3 sensor plugs into the dryer. This could disrupt electricity flow.
Troubleshooting an E17 Error Code
We all get frustrated when our dryer doesn’t work right! But don’t worry, and these codes are there to help. An E17 means the temperature sensor might be mixed up. Let’s carefully check things out step-by-step:
Check the Wire Harness
| Step | What To Do |
| 1 | Look at all the wires connecting the temperature sensor to the dryer control. |
| 2 | Make sure no wires are cracked or broken. Check that the plastic covering looks good. |
| 3 | Gently try plugging the sensor back in. Is it secure? |
Ruling Out Loose Wires
The sensor wires need to fit tightly so signals can travel back and forth clearly. Sometimes, they can vibrate loose over time. Let’s make sure:
- Inspect all connectors for damage, cracks, or corrosion
- Wiggle wires gently and check for a secure, snug connection
Don’t force anything, but a loose wire could cause confusion!
Testing For Problems
Now let’s see if we can locate any issues:
- Use a multimeter, those handy gadgets, to test wire continuity
- Continuity means a complete path – you want low-resistance
- Refer to your manual for the right readings
This will help narrow down if the problem involves the wiring.
Finishing Up
If checks show good wires and connections, it may be time for a new sensor. But repairs aren’t so bad, right?
- Replace any damaged parts
- Reattach everything carefully
- Give your dryer some power, and cross your fingers!
What is an E18 Error Code?
An E18 error code has to do with the dryer’s temperature sensor near the heating element (called R2). The control module isn’t getting important info from this sensor.
Some questions that might come to mind:
- What does this sensor do?
- Why does the dryer need it?
- How can it cause an error?
Possible Culprits
There are a few things that could disrupt communications from the R2 sensor:
- Frayed or broken wires in its circuit
- A faulty sensor that’s no longer accurate
- Loose connections where wires plug into the sensor
The good news is we can test for these issues methodically.
Troubleshooting an E18 Error Code
Do you see an E18 error code flash up on your Bosch dryer display? Don’t worry – this error is easy to figure out with some simple troubleshooting steps.
An E18 error means there is likely a problem with the R2 temperature sensor in your dryer. This sensor tells the dryer’s control panel how hot the air is inside the dryer drum and burner areas. If the sensor is damaged or unplugged, the control panel won’t get the right temperature readings.
Step 1: Check the R2 Wire Harness and Connections
The first thing to check is the R2 sensor’s wire harness. Make sure the wires are not damaged or frayed. Also, look at where the wires plug into the sensor and the control panel. Do the connections look corroded or loose? Tighten the connectors and clean off any gunk.
Step 2: Test the Wiring Continuity
Next, a multimeter tool can be used to check if electricity can flow through the wires. Set the multimeter to check “continuity.” Touch the probe tips to the ends of the R2 sensor wires. You should see a very low resistance on the multimeter display – less than 1 ohm. If the reading is high, there is a break in the wire that needs to be repaired.
Step 3: Check the R2 Sensor Resistance
If the wiring checks out, the problem could be the R2 sensor itself. Use the service manual to find the right ohm range for your dryer’s R2 sensor at room temperature. Then, test the sensor’s resistance with a multimeter. If the reading is way off from the manual, the R2 sensor will need to be replaced.
Step 4: Replace Any Damaged Parts
If you find any broken wires or a faulty R2 sensor, you’ll need to install new replacement parts. Once done, reconnect everything tightly and restore power to the dryer. This should clear the E18 error code so you can get back to drying!
Taking the time to carefully troubleshoot an E18 error can fix your dryer and prevent future overheating issues.
Clearing Error Codes
Seeing an E17 and E18 error code pop up on your dryer display? Don’t panic – it’s usually pretty easy to reset the dryer and clear the code once you’ve fixed the underlying problem.
Step 1: Unplug the Power
The quickest way to reset your dryer is to interrupt the power supply for a few minutes. You can either:
- Unplug the dryer cord from the outlet
- Turn off the circuit breaker for the dryer
Make sure the dryer is not powered for at least 2-3 minutes. This gives the control panel time to clear out any saved error codes.
Step 2: Restore the Power
Next, plug the dryer cord back in or turn the circuit breaker back on. Listen for the dryer to make its normal power-up sounds.
Step 3: Check for Errors
Turn on the dryer and start a test cycle. Keep an eye on the display as the dryer heats up. The E17 and E18 error code should stay cleared if you successfully fixed the problem!
However, if the error pops up again, further troubleshooting is needed. You’ll want to recheck wire connections, part replacements, vent blockages, etc.
Avoiding Overheating Problems
Seeing too many error codes caused by overheating? Don’t wait for more sensor failures or burning smells. There are easy maintenance tips that can improve airflow and keep your dryer running cool.
Clean the Lint Filter
Lint buildup is the number one cause of dryer overheating. Clean the lint filter before you start every load. Also, check that lint hasn’t accumulated in the filter slot or nearby ducts.
Check the Exhaust Vent
Make sure nothing is blocking the outside exhaust vent. Move away any piles of leaves, dirt, or snow. Birds and pests can also nest in the vent hood – inspect carefully before use.
Use Rigid Metal Ductwork
Flexible plastic or foil ducts can sag, allowing lint to build up. Upgrade to smooth, rigid metal ductwork without kinks or crushing. This optimizes airflow.
Follow Length Guidelines
Using too long of a vent run forces the dryer to work harder, pushing out hot air. Refer to the manufacturer’s vent length limits. Shorten or straighten ductwork if needed.
Annual Maintenance
Once a year, disconnect the ducts and use a vacuum in the dryer cabinet and vent hood to remove every last bit of lint. This prevents blockages before they start.
Avoid Overstuffing
Stuffing too many clothes into the drum restricts airflow. Only fill the drum 2/3 full and leave space for clothes to tumble freely.