Question about Carrier 38CKC042 Air Conditioner

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Tuneup kit for BDP A/C model 5690J042

My BDP, 5-ton, a/c unit was installed in 1985 and the model # 5690J042 is shown on the plate. I need to tune it up,(tuneup kit to replace Starting & running capacitors, contactors, etc) but I can not find component part numbers, equivalents components or service manual. Did Carrier change its model numbering system? Can you help?

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Re: Tuneup kit for BDP A/C model 5690J042

Hi, most of the time generic parts are used to replace bad ones. The voltages and microfarads or UF is what's important on the capacitors and the amperage and control voltage on the contactor. Your unit will not run better with new parts and I suggest your time and money be used to clean and check your unit instead of "tuning it up" with new parts. If the capacitors are swelled or leaking oil they need replaced. If the contacts are pitted or burned, they need replaced. The condensing unit will need cleaned from the inside out. Remove the fan assembly and spray from the inside out on each of the condensing coils to remove the debris stuck inside the fins. If there are oil ports on your fan motor, add about 4 drops of oil into both of them. The same on your inside fan motor. If it has a fan belt inside check it to make sure it isn't worn too badly. Adjust it if needed to give about 3 inches of play. Too tight will make your bearings go bad. Oil your bearings if the fan has then and they have oil ports. Check the evaporator inside to see if it has a blanket of fuzz on the side where the air enters it. It can be removed with a credit card when wet. Scrape along with the fins if it needs cleaned. With the unit running and the inside of the house fairly comfortable the large refrigerant line outside should sweat all the way up to the compressor but the compressor should remain fairly dry. If it does, you have a good refrigerant charge. With this cleaning and oiling your unit should work more efficiently and be ready for another year. NOTE: The heating/air-conditioning companies usually run a special on seasonal checkups. If you have one come out, Have them do all the above plus get your furnace cleaned and ready. If you want more information on the furnace, please let me know what kind it is and I will try to help. If this solution does not rate at least (ALMOST THERE) Please do not rate. Thank You. kstfas

Posted on Sep 28, 2007

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Re: Tuneup kit for BDP A/C model 5690J042

If indeed it is a Carrier 38CKC042 model and 208/230 single phase, you need part number HN51KC024 for your contactor and the Dual Capacitor is P291-4054RS. Your unit may have 3 more numbers on the manufacturers plate that will be required to verify these parts.

Posted on Sep 28, 2007

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