2002 Honda Odyssey fan only works at high speed. The A/C compress

If you have a fan that has different speed settings (1234, or low med high etc) and the only one that works is high - then the blower resistor pack has failed. If you have a climate control unit (where you just pick a temp you want) then the fan is controlled by the heating system and it sets fan speed. If you have climate control style try lowering the temp to a lower setting (current temp in vehicle) and see if fan slows down. If not then climate control unit or fan resistor bad. If dial type and you get nothing on lower settings (only high works like mentioned above) you need to change blower resistor. It is located under dash near the fan itself. Look for small unit bolted in duct near fan with wire plug going to it.

It is not the blower motor.
On the 2002 model, I am showing an HVAC control module and a blower control processor. The control module handles the temp control and blower speed, and the processor contains the resistor for slower blower speeds.
Which component did you replace ?

There should be a high speed blower relay that bypasses the resistor for slower speeds.
Check with an auto parts store or the dealer.

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The blower resistor will keep it from working on anything but high

Check the blower motor resistor pack is not faulty.
The resistor pack (for speed control) is usually located in the blower fan ducting in the air flow .

sounds like your restrictor box is takeing a ****.. does it work on any of the 4 fan speeds?

THE MEANS YOU AC IS EMTY CHECK ONE OF AC. LINES LOW PRESSOR TAKE THE TOP OF AND STICK SAME THINK INSIDE THE HOLE TO SEE IF THERE IS SOME PRESSURE COMES OUT

If the fan only works on high speed I'd suspect a bad resistor in the fan circuit. On a new car it may be called by a different name but in essence does the same thing. It steps voltage down to the fan motor in all speeds but high. I'd check that first assuming there is no obstruction interfering with fan operation in all speeds but high overcomes that obstuction. I've seen mice among other things in a fan box on many occasions. I think the A/C problem is unrelated to your fan problem. This one may be a little harder to solve. The first thing to check is Freon level. The compressor won't cycle if the freon is low to avoid damage to the compressor. Do the fans, both under the hood come on when you turn on the A/C? If so it is more than likely just a Freon issue. If not take it to your local Honda Dealer.

The A/C pressure switch is located in the high pressure line (the skinny one) on the passenger side of the engine compartment just under the fuse/relay box. The switch has three functions: <28 psi, the switch opens to protect the compressor from lack of lubrication. >220 psi, the switch shifts the radiator and compressor fan to high speed. >455 psi, the switch opens to protect the compressor seals. Check to see if you have any powertrain DTC's first. A faulty engine coolant temp sensor can cause problems with the compressor clutch relay. If the radiator and compressor fan come on with the A/C on but the compressor clutch does not operate, check the compressor clutch relay. You can also obtain Heater control panel diagnostic trouble codes (DTC's) by turning the ignition switch on. Then turn fan switch off. Press recirc button to select recirc air. Press and hold recirc to turn off recirc air but this time continue to hold the button down until recirc light comes on for two seconds and then goes off. If there is any trouble, the recirc light will then blink a code (if no trouble, the light will remain off) 1 blink = problem in air mix control motor circuit. 2 blinks = a problem in mode control motor circuit. 3 blinks = a problem in evaporator temperature sensor circuit. (this one could be a factor in your case) Turn the ignition switch off to end the test.