Here's an unusual one...
This is a Gallenkamp oven, used in a laboratory space, goes up to 220 Celcius, but is usually maintained at about 115 Celcius. Used for drying glassware, molecular sieves, and so on. Oven is in excess of 20 years old.
It heats up fine, there is an orange light on the front that indicates that the unit is heating, and when it reaches the preset temp, the orange light goes out. All good so far.
However, after the preset temp is reached, the temperature continues to rise, power to the heating elements isn't cut off.
Temp continues to increase until the over-temp temp setting is reached, in which case the red light comes on, and the power to the elements is shut off, the over-temp switch is tripped, and the unit cools down.
Pressing in the reset switch allows the unit to heat up the chamber again, and it will again over-temp and switch off, etc.
I've attached a couple of photos of the front panel and electronics inside.
Fuses are ok. Any area in particular to home in on for testing?
This is a Gallenkamp oven, used in a laboratory space, goes up to 220 Celcius, but is usually maintained at about 115 Celcius. Used for drying glassware, molecular sieves, and so on. Oven is in excess of 20 years old.
It heats up fine, there is an orange light on the front that indicates that the unit is heating, and when it reaches the preset temp, the orange light goes out. All good so far.
However, after the preset temp is reached, the temperature continues to rise, power to the heating elements isn't cut off.
Temp continues to increase until the over-temp temp setting is reached, in which case the red light comes on, and the power to the elements is shut off, the over-temp switch is tripped, and the unit cools down.
Pressing in the reset switch allows the unit to heat up the chamber again, and it will again over-temp and switch off, etc.
I've attached a couple of photos of the front panel and electronics inside.
Fuses are ok. Any area in particular to home in on for testing?
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