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Acura MDX heating and cooling questions

12 messages,  Last post on Oct 30, 2009 at 6:46 PM

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#8 of 12 Re: No power/air to rear heating/AC 2003 MDX touring [dmz616] by mdxdriver14224 Oct 12, 2009 (3:20 pm)
Replying to: dmz616 (Jun 18, 2009 10:51 am) Do you have the details on replacing the thermal cutoff? What part to order and from where? Replies to this message: dmz616 (Oct 13, 2009 2:11 pm) mdxdriver14224 (Oct 13, 2009 7:14 pm)
#9 of 12 Re: No power/air to rear heating/AC 2003 MDX touring [mdxdriver14224] by dmz616 Oct 13, 2009 (2:11 pm)
Replying to: mdxdriver14224 (Oct 12, 2009 3:20 pm) The part that is soldered inside the transistor assembly that went bad is a Thermal Cutoff (like a pigtail fuse) rated at 114C, 2A,/250VAC. Digi-key (800-344-4539) part number P10920-ND. Piece price was around $0.50, ordered a few since postage was a couple of bucks. Take the vertical carpeted piece out at the bottom drivers side of the center console being careful not to break the plastic clips. See the wire vent; clean this as the clogged vent is what causes the overheating. To the rear of the vent, toward the rear of the vehicle, see the plugged in transistor assembly. To remove, twist it. It may be hard to remove, had to use a pair of special pliers that my honda guy had, but it may come loose without needing them. Unsolder the thermal cutoff & solder in the new one, etc. We try to remember to turn off the rear unit at the dash when nobody is in the rear seat, especially on a long trip. Do not know wht Acura did not at least make the cleaning of the vent a maintenance item! Replies to this message: mdxdriver14224 (Oct 13, 2009 7:14 pm)
#10 of 12 Re: No power/air to rear heating/AC 2003 MDX touring [dmz616] by mdxdriver14224 Oct 13, 2009 (7:14 pm)
Replying to: dmz616 (Oct 13, 2009 2:11 pm) Thanks for the detailed item and installation, I'll let you know how it goes.
#11 of 12 removing center council by 1dieseldriver Oct 24, 2009 (11:19 am)
dose anyone have a detailed diagram on council removal?
#12 of 12 2003 Rear A/C controls repair. by mdxdriver14224 Oct 30, 2009 (6:46 pm)
The repair for my 2003 MDX, were exactly like the 2002 MDX mentioned earlier. The transistor assembly is removed by turning it clockwise about 1/4 turn. The thermocouple is acessed by removing the plastic cover and the metal heat sink. There are 2 screws on the end, and 1 screw holding the power transistor firmly against the heat sink. Thermo-coupler is soldered in two places and bent to fit along the top of the power transistor. make sure you leave some of the thermal grease so the new thermo couple makes a good seal against the heatsink and transistor. The thermocouple leads should be insulated before you solder it in place.

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