Why Is There Condensation on My Oven Glass?

Jul 28, 2023, 15:26pm

While cooking certain foods, condensation may form on your oven door. This is normal for foods that contain water and when the glass is still cold. But if the humidity is very often present, to the point of dripping through the door, the following elements will have to be checked:

  • Check the location of the oven
  • Check the door seal
  • Test the tangential fan

When you use the oven to cook foods with a high water content, such as vegetables, it is advisable to use a dish closed by a lid. This will prevent moisture from escaping and settling on your oven glass.

If you’ve ever peered into your oven while cooking and noticed a sheen of moisture on the glass door, you’ve encountered a common phenomenon known as oven condensation. While it’s not generally a cause for alarm, it can leave you wondering why it’s there. This article will explore why condensation forms on your oven glass and if it’s a sign of an underlying issue.

Why Is There Condensation on My Oven Glass?

Understanding Oven Condensation

Condensation is a natural process that occurs when water vapor cools and changes back into liquid form. This process is commonly seen on windows during a chilly morning or on a cold beverage on a hot day. Similarly, your oven glass can also experience condensation, especially during cooking.

Why Does It Happen?

  1. Humidity in Food: Most foods contain water to varying degrees. When you heat food in your oven, the water within the food starts to evaporate, turning into steam. When this steam hits the cooler oven door, it condenses, forming water droplets, which appear as condensation on your oven glass.
  2. Temperature Differences: The temperature difference between the hot oven interior and the relatively cooler oven door can also cause condensation. When the warm air inside the oven comes into contact with the cooler oven door, it cools down and loses its ability to hold as much moisture, leading to condensation.
  3. Improper Ventilation: Ovens are designed to vent out steam during cooking. If the ventilation is obstructed or not functioning correctly, the excess steam can lead to increased condensation.

Is Condensation a Problem?

In most cases, condensation on your oven glass is perfectly normal and not a cause for concern. It is a natural byproduct of the cooking process, especially when cooking moist foods or large dishes that release a lot of steam.

However, excessive condensation that leaves puddles of water or interferes with the oven’s operation could be indicative of a problem. This could be a sign of a poorly sealed oven door, a blocked vent, or a malfunctioning cooling fan.

Addressing Oven Condensation Issues

If you notice excessive condensation, here are a few steps you can take:

  1. Check the Oven Door: Make sure the door is sealed correctly. Any gaps could be letting cool air in, leading to increased condensation.
  2. Inspect the Vent: Ensure the oven vent is not blocked or covered, allowing the oven to vent out the steam properly.
  3. Preheat the Oven: Preheating your oven before cooking can reduce condensation. It allows the oven to reach a stable temperature and can help moisture evaporate more quickly.
  4. Seek Professional Help: If the problem persists despite these steps, it’s advisable to consult with a professional technician who can accurately diagnose and resolve the issue.

In conclusion, while condensation on your oven glass can seem puzzling, it’s usually just a natural result of the cooking process. However, always keeping an eye on the performance of your appliances and recognizing unusual behavior can ensure they stay in excellent working order, serving your culinary pursuits faithfull.

Why Is There Condensation on My Oven Glass?


Your oven door seal seals and prevents fumes and moisture from escaping. If it’s in poor condition, that might be the cause of your problem.

  • Open the oven door.
  • Observe the condition of the seal along its entire length, if necessary, carefully remove it from the groove.

If the seal is worn, gnawed, or in poor condition, replace it with a model compatible with your device.


A tangential fan, located at the top of the oven, is designed to remove moisture and steam from the cavity and between the glass panels of the door to the outside. Failure to do so may result in condensation inside the device.

  • Put on protective gloves and turn off the power to the oven.
  • Remove it from its place and place it on a flat, stable surface.
  • Locate the fan at the top of the oven chamber, unscrew its support for more convenience.
  • Disconnect the power cables from the fan and remove it .
  • Set the multimeter to the lowest value in ohmmeter mode (Ω symbol, 200 Ω or 600 Ω manometer).
  • Measure the fan resistance by placing two measuring tips on the two lugs, after disconnecting the metal connection points.

If the multimeter reads between 50 ohms and 100 ohms, the fan is good. On the other hand, if it displays “1” or “OL”, it will have to be replaced with an equivalent model.