2 Amp With 130 Degrees Thermal Fuse Replacement
A doctor and a friend of mine brought this device for repair. The customer explained that while the heating device was up and running it stopped working and it was not due to an electrical issue in the house.
It is a one unit device, just plug into power, choose the right setting and let the heating/cold air flow.
In this case it was completely dead and as seen in the photo there is no sign of life into it.
I took the cover off for further check up and by visual inspection I could not see anything wrong with it.
It was very clear to me that this device was opened before because if you look to the screws they are not fully tightened.
The customer explained that he took it to a technician but it was not repaired.
The first logical thing to do is to check for any voltage going inside the machine and as seen in the photo, the device was getting the right voltage but for some reason, it was not powering on.
I traced the power rail all the way to this transformer and it was getting the 220 AC volts but it was not producing the 12 AC volts to power on the device. So I found the fault but now I need to find a replacement.
I could not find any replacement for this step down transformer but I found a way to get it up and running again. When I flipped the transformer to the other side I could find the thermal fuse in there and my hope was to see this fuse open because I have plenty of these fuses available in my shop.
So my expecting and my hope came true as I tested this thermal fuse and as seen, it was open and that put a smile on my face.
I was hoping that this was the only fault in this device so I replaced it and hoped for the best.
It was a 2 amp with 130 degrees thermal fuse so I went ahead and replaced with a brand new one, added an isolation tape on top and I re soldered it on board.
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
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Note: You can check his previous article on Found 4 Faulty Components In A Battery Charger