Question about 2001 Acura MDX

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2001 Acura MDX heat/ac fan comes on about 45 seconds after starting car. Sometimes it comes on when car is started. A/C works fine, blows cool, fan is sporadic

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Check you switch, resistor (if so equipped), and wiring for a bad connection, corrosion, or short.

Posted on Sep 09, 2009

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Can't start my 2001 mdx with remote starter screen showing fuel average heating fan comes on only when I press brake padel rear wiper on off it self


try removing fuses on passenger side kick panel and cleaning the contacts and reinserting for problematic issues, suggest duing to all fuses, mdx 2001 has known issue with fuses becomming corroded or dirty without actual evidence, 90% of the time removing the fuse and reinserting after cleaning or even repeatedly removing and inserting will solve many issues on that year of the mdx, if problem persists, suspect faulty switch or modules.

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honda pilot and acura mdx share a lot of the same parts. The rear blower motor resister is known to go out after a while.
http://www.acuraworld.com/forums/f8/mdx-back-seat-blower-doesnt-work-71111/

Either buy the honda part 80 bucks, or you can buy a resistor and fix it yourself for about 10 bucks. Details in the link above.

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I have a 2007 mdx. the ac is blowing warm air. have checked the refridgerant,the compressor, fuses, relays are good! My mechanic hooked up the diagnostics and cleared a code the ac worked. but after a few...


I don't have this problem yet but however it sounds like the control board has detected an issue possibly related to a sensor somewhere. Just guessing.

Jun 06, 2014 | 2007 Acura MDX

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Citroen troubleshooting


I had similar problems 2 times with the automatic heat / AC module.
I suppose your system is automatic too.

First time the commands were working erratically acting weird. Sometimes was heating at full capacity blowing heads off. At other times it was not starting at all.
The whole module had to be replaced.

Second time if the car stayed in the sun the AC was heating, after starting the engine and cooling started only after achieving greater speeds (above ~60km/h). Whenever the speed decreased the system began to heat again eventually. It turned out that the engine cooling fan was broken and had to be replaced. That fan cools both the engine radiator and the AC radiator. If it is faulty your engine might be at risk of overheating at low speeds.

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Is the front fan working? Or is air from outside pushing through the heater core causing heat to come out when driving?

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I have a 2007 Acura MDX and its take forever for the air to get cold. Once it starts getting cold it work AMAZING, however waiting 20-30 minutes for the air to start is the WORST!

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What's the problem with my AC conditionor? I have a 2003 Acura MDX. The 1st time I start my car (in a day) the ac is working fine. After driving the car and parking it for 5 min (while the engine is...


Just a thought: If your car has 2 electric fans under the hood one of them runs anytime your AC is on. Make sure one of them is running if you have 2. When your engine warms up both will come on. Check when the engine is cold to see if 1 fan comes on when you turn the AC on. Another thing which has happened to me. I had a bad AC relay after running a while it would get very hot when AC seems to quit working try feeling the AC relay if it is a lot hotter than the other relay that could be a problem. One more thought To add Freon the car has to be running and the AC on.

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two things you may try, relocate ambient sensor to colder place, remove it from front bumper, and connect the two wires on refregerant temp sensor located @ rear of compressor, be carefull and observe your a/c system after doing this

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1 Answer

My mdx 2002 acura fan blows constantly and kills my battery.


You most likely have a sticking fan control relay.
Remove the relay to confirm fan stops.

Aug 19, 2009 | 2002 Acura MDX

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