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ApplianceGuru.com: The Samurai Appliance Repair Forums > Do-It-Yourself Appliance Repair Help > The Laundry Appliance Repair Forum > Kenmore 110.87872602 dryer error code F70 |
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| Kenmore 110.87872602 dryer error code F70 | Rate Topic |
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| Posted: Fri Oct 2nd, 2009 06:54 pm |
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1st Post |
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ls007 Chief Apprentice Appliantologist
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I have the Kenmore dryer a little more than 1 year old (so it is out of warranty...how convenient for Kenmore). It stops mid cycle and shows error code F70. A search online shows a number of possible reasons but it seems to be an overheating problem. I can run the dryer again after disconnecting it and letting it cool down for about 30 minutes. The frequency with which the error occurs is variable. Right now it can'r run for more than 5 - 10 mins so the it is pretty much inoperable right now. I am going to try taking the dryer apart and clean the lint on motor. You divine help is needed O Samurai!
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| Posted: Fri Oct 2nd, 2009 08:46 pm |
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2nd Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology 
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F:70 F:71 No Communication Between Electronic Assemblies F:70 / F:71 flashes when there is no communication between the machine control and the console electronics. Check console electronics harness connections to the machine control. Replace the machine control electronics. See Accessing & Removing the Electronic Assemblies, page 9 110.87872602 Tech Sheets
____________________ RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” (also in HQ) http://www.youtube.com/watch?v=-EBiLyYXMiA Upon leaving this Earth "Do you want the Smoking or Non-Smoking section ?" |
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| Posted: Sun Oct 4th, 2009 05:23 am |
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3rd Post |
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davidg Master Appliantologist
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call sears; get a service smart agreement; about $220.00 ; pays for entire repair ; parts and labor and gives you a 1 year warranty on the entire machine. can't beat it for this kind of problem; just tell them it won't work; no details
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| Posted: Mon Oct 5th, 2009 07:47 pm |
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4th Post |
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ls007 Chief Apprentice Appliantologist
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There have been many different suggestions about the cause and some work on my side to diagnose and fix the issue. First the causes: Reply from Repair clinic repair guru: Dear Madam/Sir, Thank you for your recent inquiry, regarding your 2008 Kenmore Dryer, model: 11087872602. F70 = Overheating sensed causing dryer stop until temperature reaches(drops) below set level - determined by manufacturer Can be caused by different contributing factors; 1. poor airflow 2. blocked air flow screen inside tumbler 3. clogged lint screen 4. slow tumbler (low revolutions) NOTE; Ironically, the fourth factor has been lurking behind the popular discussions on this problem that has exhibited itself on both the whirlpool and Kenmore products with the main triage to have included inspection of the electrical connections made by the installer. These electrical connections not followed properly with accordance to '4prong' NEMA 14-30R (30amp, 2-phase circuit outlet) with separate ground and neutral posts, as exhibited in the standard dryer installation manual, will cause your tumbler to run slow. Hence, the 4th factor which caused the 'F70' code stops the dryer from operating. Now, you have corrected the wiring as necessary and eagerly place some stuff's in there and all seems well. But as soon as you place something large and wet (HEAVY/BUNDLE), you get the error code again, you thought you had it! Okay, this is what you need to do; 1. make sure your air flow is adequate by really cleaning the duct (I stuck my hand through the wall duct and scraped off old hard lint that can collect humidity & even cut my finger). Also make sure your vent hose does not have any unnecessary elbows or squiggles in it ( I had an elbow/pan type and it is not good as the heat seems to reflect too much ). KEEP IT AS SHORT AS POSSIBLE - I KNOW IT'S HARD, BUT IT IS NECESSARY. 2. Refrain from using too many softener sheets as they can & will restrict the air flow screen inside the tumbler. 3. Make sure your lint screen is clean - wash it periodically as lint particles collect moisture and this in turn raised humidity. 4. Once you have verified your electrical connections as stated earlier in this posting, run a normal cycle with towels or something of the like so as to reset the sensors in the dryer. . THE MAIN THING TO REMEMBER IS THAT 'F70' SEEMS TO BE THERE TO PROTECT AGAINST OVERHEATING WHICH IN TURN CAN TURN TO A FIRE HAZARD! Reply from Appliancepartspro: I cannot find info on this specific error code but a search for it on the web using Google brings up a mess of others with the same problem. Some say it is a board/communication problem, others a temp sense problem. You could try the following Undo the dryer from the exhaust Run a load If the load dries correctly then you have a vent problem. Clean/check the vent system. Make sure the outside louvers open fully. If you do not want lint in the house. Take a pair of pantyhose, put one leg into the other and attach this to the dryer exhaust. Leave enough room behind the dryer so it can blow out like a windsock. Run a load. The tech sheet kindly provided by a member on this forum shows F70 as a control board issue as noted in this thread. So what did I do so far: Opened the top and back panel and thoroughly cleaned the lint. I did not however, think that the lint was excessive as to cause motor malfunction. I also unhooked the dryer from exhaust and ran three loads and they all dried without the error. Now it is possible that removal of lint did the trick but it looks like the venting issue as suggested in one of the replies has some credence. next I will hook the dryer back to wall exhaust and run a few loads. if the error returns I will focus on venting. The main question that I am asking myself is that if the control boards are at the heat of issue would it possible to do any loads without the error. Your comments and suggestions are very welcome. I hope all this works ends up in a running dryer and helps other people struggling with the same problem. Thanks to davidg for the suggestion on smart service agreement. i will do that if all else fails!
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| Posted: Mon Oct 5th, 2009 10:39 pm |
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5th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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Is there any reference where he got that F70 code info ? Tech Sheet shows different
____________________ RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” (also in HQ) http://www.youtube.com/watch?v=-EBiLyYXMiA Upon leaving this Earth "Do you want the Smoking or Non-Smoking section ?" |
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| Posted: Mon Oct 5th, 2009 10:59 pm |
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6th Post |
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NCSU_laundry_tech Sublime Master of Appliantology 
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fwiw i did see a dryer that was improperly side vented(was venting inside dryer) throw f70. i hooked up the vent correctly and changed the main board.
____________________ To alcohol! The cause of... and solution to... all of life's problems. Doc Watson - Shady Grove: http://www.youtube.com/watch?v=b-kaG1NuLZM riding my dirtbike in clayton NC: http://www.youtube.com/watch?v=NnCmY0vzmYM |
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| Posted: Tue Oct 6th, 2009 01:02 pm |
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7th Post |
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ls007 Chief Apprentice Appliantologist
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I think all the information was pulled from internet. I had previously seen all the versions that were provided. NCSU Could you explain in more detail how the venting was improper. I will try to take pictures and upload to ensure my venting is correct. it is side vented currently. Also why did you need to change the board?
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| Posted: Wed Oct 7th, 2009 01:05 am |
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8th Post |
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NCSU_laundry_tech Sublime Master of Appliantology
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the vent duct fell off the blower housing so the hot air went into the dryer instead of outside. i changed the board so i wouldnt have to go back again
____________________ To alcohol! The cause of... and solution to... all of life's problems. Doc Watson - Shady Grove: http://www.youtube.com/watch?v=b-kaG1NuLZM riding my dirtbike in clayton NC: http://www.youtube.com/watch?v=NnCmY0vzmYM |
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