Bosch tumble dryer WTA74200GB not heating and finishing drying

Troubleshooting a Bosch Tumble Dryer Model WTA74200GB/07: No Heat Issue and Early Shutdown. Despite the drum rotating normally and running for about 15 minutes, my Bosch tumble dryer fails to produce any heat, leading to incomplete drying cycles. This issue persists even though the moisture sensor, often a common culprit in drying problems, seems operational (as seen in your informative YouTube video). Additionally, I have attempted a diagnostic approach using an amperage meter, noting that the dryer only draws 170 watts of power. Could this indicate a malfunctioning heating element or thermostat? Or might it be related to other components such as the thermal fuse, drive motor and belt are all okay do you think it could be the control board? Your expert guidance on identifying and resolving this issue, including insights into the dryer's electrical and mechanical systems, would be highly appreciated. Jim Hawthorne

I will try and help with this problem Bosch tumble dryer WTA74200GB/07

Hello Jim,

I'm truly sorry to hear about the troubles you're facing with your Bosch WTA series tumble dryer 🛠️. It's definitely a headache when your dryer isn't heating as it should. Your approach to using an amperage meter for testing is spot-on 👍 – it's a fantastic tool for diagnosing issues in various appliances and even for calculating their running costs.

I've put together a detailed video that walks you through the process of testing the entire heating system of your tumble dryer, including the NTC sensor. This particular model features two cycling thermostats: one set at 65 degrees and another at 110 degrees 🌡️. Additionally, the NTC sensor and the moisture sensor, located at the front of the machine, play crucial roles in controlling the heating system. When there's no heat, it's vital to thoroughly inspect both thermostats and the heating element, as I've demonstrated in the video 📹.

You'll find the video below, along with other useful videos specifically tailored to your Bosch tumble dryer model. To further assist you, I've included exploded diagrams at the bottom of the page 📊. These will give you a clearer picture of the dryer's internal components.

While we do stock some parts for this tumble dryer in our UK warehouse, most are sourced from major suppliers 🌍. To make it easier for you to find the correct part, I've compiled a comprehensive parts list. Just match the part number on the diagram with the reference number in the sheet provided. This will guide you to one of our suppliers, who will likely have the part in stock if we don't 🛒.

I strongly suggest watching both the video on the moisture sensor and this new video. They'll give you a deeper understanding of how your tumble dryer is put together and how its heating system operates 🔧. I hope this information will be instrumental in solving your problem. If you have any further questions or need more guidance, feel free to reach out. We're here to help!

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