Suggest getting a mirror and reading the markings on the sides.Blue cube gets hot? seems wrong. Looks wrong to be a relay though, I think it might be a transformer.
Suggest getting a mirror and reading the markings on the sides.Blue cube gets hot? seems wrong. Looks wrong to be a relay though, I think it might be a transformer.
We've used the range hood a lot over the 8 years we've owned the house. The way it's set up the fan always starts out on speed #2. But we've mostly used speed #1 as it has quite adequate air movement and is very quiet.Relays get warm but hot to the touch no good.
Without knowing the exact circuitry that relay could be controlling the fan speeds. Did the range spend most its life on speed 2?
Took the 2 capacitors out after being unplugged for an hour or so. Neither had any measurable voltage and there was no spark when the terminals were shorted. That surprised me. I was expecting something.Cheap and dirty electrolytic capacitor test: Using a VOM (Voltage Ohm Meter) set on "ohms", connect the one meter probe to one capacitor lug. Connect the other probe to the other Lug. Wait for the ohm meter to count down to zero. Now switch the probes. The meter should start out high and slowly count down to zero. Switch the probes again and you should get the same results. This shows a good capacitor. A bad capacitor will show an open (no reading on the ohm meter).
As expected reallyTook the 2 capacitors out after being unplugged for an hour or so. Neither had any measurable voltage and there was no spark when the terminals were shorted. That surprised me. I was expecting something.
Did the resistance test. Both capacitors initially were something like 7 - 10 Ohms, then quickly went to infinity. Reversed leads and tested several times with the same results.
Conclusion - both capacitors are fine.
Don't have an IR thermometer. But one of my friends might. I'll check.Do you have an IR Thermometer? Check the "blue cube". Rated at 70°C
Yup, on closer examination, it does appear to be a transformer. Even worse it gets hot. But easily replaced. A schematic would really help.Blue cube gets hot? seems wrong. Looks wrong to be a relay though, I think it might be a transformer.
The blue block in the link is very similar (practically identical) to the blue block in my unit.The blue cube is still a mystery. If we could see pictures of the circuit board around it that might help. There are wires covering that. That and the markings on the top are not helpful and don't tell me that it's a relay. That and a relay really shouldn't get hot (but I would expect a transformer to at least get warm). Is there anything written on any of the sides of the blue cube?
Otherwise, it does look a lot like one of these transformers:
That looks right.That's a transformer, with part number BV 030-73300 T
Possibly this one:
030-7330-0 PULSE ELECTRONICS CORPORATION, 030-7330-0 Datasheet
Request PULSE ELECTRONICS CORPORATION 030-7330-0: Audio & Signal Transformers 2.3VA EI30/18.0 115V 12V online from Elcodis, view and download 030-7330-0 pdf datasheet, Audio specifications.elcodis.com
What is the 12V driving?I don't think that transformer should be warm to the touch. Not unless if there is a big load hanging off 12V when being tested.
To your point, if this was that hot doing nothing, and then you do some cooking... it's going to be worse. Sure, it should handle 100C w/o issue, but still, I would not expect it to be more than just above ambient when doing nothing.
That’s what I was wondering maybe the lights?What is the 12V for? Control circuit??
It's a good question. Just a swag but I'm guessing 12V is being used solely for relay power, probably runs the micro too, everything else is probably using regular AC. Just a guess. 2.3VA seems low, never worked with transformers but I think VA is RMS voltage times RMS current, regardless of phase angle, so it's not proper to call that 2.3W. Ignoring that bit, it's clearly not much umph to run anything (200mA?).What is the 12V driving?
The light are standard push in Halogen bulbs so I'd think they be 110 - 120Volts.That’s what I was wondering maybe the lights?
My friend who dealt with electronics during his career says that transformers are often warm but shouldn't be hot.I don't think that transformer should be warm to the touch. Not unless if there is a big load hanging off 12V when being tested.
To your point, if this was that hot doing nothing, and then you do some cooking... it's going to be worse. Sure, it should handle 100C w/o issue, but still, I would not expect it to be more than just above ambient when doing nothing.
That looks right.
The one in the link requires a minimum order of 10 (which I don't need or want). But knowing the part number, it can probably be found elsewhere.