My Bosch Dryer Won’t Heat

Bosch Dryer Won't HeatThere’s perhaps no bigger disappointment in the world of appliances than reaching down to empty the clothes dryer only to find a heap of still-damp clothes waiting inside the machine. Not heating up is a common problem in clothes dryers, even when dealing with quality brands like Bosch dryers. One difficulty, however, is that a Bosch dryer might not heat because of many different causes, and it can be hard to understand the root cause of your dryer’s issues.

If you are dealing with a Bosch dryer that won’t heat, read this guide for more information on potential causes, and potential fixes. Read on for more details.

Safety First

When working with any appliance, it’s always important to remember and follow a few basic safety tips. Although safety procedures can differ depending on appliance and situation, here are some safety basics.

Always make sure you have adequate space when working on your Bosch dryer. Pull it out away from the wall when necessary. Always make sure the appliance is unplugged before opening the cabinet or servicing interior parts. Make sure the dryer is cooled down and not hot before your work on it, and always wear appropriate clothing when working with tools and equipment.

Finally, if you don’t feel comfortable working in or around your Bosch dryer, don’t be afraid to call in a professional who can help you solve your problem in a safe and efficient manner.

Components to Check on a Bosch Dryer that Won’t Heat

If your Bosch dryer won’t heat, there are a few different components you can check on to get to the root of the problem. Go through each of these components in turn, and see if you can determine what might be stopping your Bosch dryer from heating.

Dryer Heating Element

In a Bosch dryer, the heating element is the primary way that air is warmed in the dryer before it enters the dryer drum to dry your wet clothes. Heating elements are perhaps the most common cause of dryers not heating up properly. Through constant use, elements can wear out, break, or burn out.

Sometimes you can do a primary check of a heating element through the back of your Bosch dryer. A vent grate protects the element while allowing it exposure to air. In some models, you can actually see the element glow red hot through the grate if it is working. If you don’t see a glowing red or orange color during operation, your element may be bad.

Use your owner’s manual to access the element inside the dryer’s cabinet. Once you find it, you can visually inspect it for signs of breaking, wear, or cracking. Sometimes elements can exhibit blistering, blackening, or a gray ashy color if they are bad. Also be sure to check the element’s connection and surrounding wiring.

You can perform a final check with a multimeter if you feel comfortable using such a device. If the element is bad or broken, you’ll need to replace it with an identical element according to your user’s manual.

Power Problems

If your Bosch dryer is not heating, then you may have an incoming power issue. Electric Bosch dryers have high power requirements, totaling 240 AC volts. This is far different than most of the appliances and outlets in your home. It is not uncommon for only one fuse or breaker associated with your dryer to trip in a home, resulting in the dryer able to run, but not heat. Check the fuse box or circuit breaker in your house to be sure that you haven’t tripped just one breaker when using your Bosch dryer. You can also check power at the source using a multimeter. If you’re not getting the correct voltage at the outlet, it may be time to call in a pro.

High-Limit Thermostat

A high-limit thermostat monitors the Bosch dryer temperature and shuts off the heating elements if the dryer begins to overheat. If the high-limit thermostat is not working, it may prevent the element from heating even though it is in normal operating limits. This is not a very common occurrence, so be sure to check other possible problem areas in your dryer before thinking about replacing the high-limit thermostat.  You can test the thermostat by using a multimeter, if you are handy with such a tool. If the thermostat does not have continuity, it will require replacement.

Main Control Board

The main control board on your Bosch driver controls all operations within, so it is a possible culprit if your Bosch dryer runs but will not heat. It is not all that common for a main control board to break, so it should be considered only after you’ve looked at any other potential issues in your dryer. It is also difficult to test the control board electronically, so that job may be best left to a professional. If you are able to, you can open the cabinet of your Bosch dryer and inspect the main control board for signs of burning or short-circuiting. If the board looks damaged, it may be time to seek the help of a professional in replacing it with an identical board.

If You’re Not Making Progress

If you’re worked through this page and you still don’t feel you’re making progress, it may be time to call in the professionals. Modern appliances can be difficult to diagnose and troubleshoot, but a local dryer repair technician will have the experience to handle your Bosch dryer repair right away.