Live Help
Repair Forum
Beer Fund
Cool Stuff

Fixitnow.com:  Kicking Appliance Butt All Over The Globe

The Oracle of Appliance Enlightenment

Buy Appliance Parts Here!

Search the vast repository of wisdom at Fixitnow.com:
  Web Fixitnow.com

Oven Temperature Sensors Demystified

appliance tip of the day archive

Everyone knows what thermostats do: turn something on and off based on temperature. If your range has an electronic range control (ERC) board with the digital LED display, it doesn't have a thermostat. You know what I'm talking about, most ERCs look something like this as opposed to the old analog clocks.

oven temperature sensors -- click for larger viewRanges with ERCs use a sensor to "feel" the temperature in the oven cavity and sends that information to the ERC. The ERC then makes decisions about about heating the oven and controls the burner (in gas ovens) or heating elements (in electric ovens). Typical styles of range temperature sensors are shown here.

Inevitably, your range will one day start acting goofy and you'll need to check the oven sensor to see if it's causing a problem. On most ranges, a big clue that the sensor is the problem is if you're getting an F1 error code in your ERC display. So how do you check the sensor? Keep reading.

Oven sensors sense the temperature is the oven cavity by increasing their internal resistance, measured in ohms, as the oven's temperature increases. This change in ohm resistance tells the ERC the oven cavity temperature and it turns the heating elements for burner on and off, as needed. Now, hang with me, grasshopper, 'cuz we're getting to the good part.

At room temperature, 70°F, the resistance of the most common sensors used today is 1000-1100 ohms. What this means is that if you pull those sensor wires to measure the sensor's resistance and it reads slap-a$$ open, why, it don't take a rocket scientist like myself to figger out that you got yourself a bad sensor! Wasn't that easy?

Just for grins, I've included the table below to show you the sensor resistance reading at various temperatures. Viva la Resistance!

Oven Sensor Resistances
Temperature (°F) Resistance (ohms)
100 1143
200 1350
300 1553
350 1654
400 1753
500 1949

grasshoppers sitting with the master calibrating their ohm meters to check their oven sensors

Podcast | Live Help | Buy Parts | Repair Forum | Beer Fund | Cool Stuff | Home

I know, you're wondering how I do it--how did I manage to create the most awesome appliance repair website on the internet and be such a stud-muffin all at the same time?  My secret:  beer.  Lots and lots of beer.  Here's your chance to contribute to my debauchery. Back to Oven Repair Manuals

BBBOnLine Reliability Seal Your Appliance Guru:
Samurai Appliance Repair Man

URL: http://www.fixitnow.com
© copyright 1997-2004 Live It Up LLC
No part of this website may be reproduced or copied without the prior written permission of Live It Up LLC.