Скачать или смотреть How to check the HVAC fuse without a meter

You can see if a fuse is blown if there is a window. The window will have a flash mark on it. If the fuse is a cartridge fuse, there is no way of telling if you don't have a meter to test with. Also replacing a fuse with one of higher amperage.
This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. If you have suggestions or comments they are welcome.
If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. Know your limits.