I’m repairing the main control board for a HVAC unit that was damaged in a power surge. Nothing too complex, just a diode that was blown and needs to be replaced.
The problem is I’m not exactly sure what part number the diode has and I want to make sure I get the right specs for the replacement (like how much voltage it can handle and whatnot.)
I’ve attached a picture of the diode, and you’ll see it has markings that may seem like a part number but Google did not yield any results. To further that the exact same board for another damaged HVAC unit has different markings for the same diodes.
These are for the compressor and exhaust fan signals for any curious souls (but are scattered all along the board.)
Anyway, could someone help me identify a proper replacement? The measurements for the diode, not the the mount, are approximately 4.2 mm x 3.5 mm. The top says “CT” by the way, and the bottom of the diode has no markings.