Question about Maytag Dryers
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)
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, Geeeezzzzz, 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.
What my wife keeps doing is to put a back in after it's Heavy Buncle cycle (because it's not fluffy) and the dryer start up with high heat and then senses over heat and then SHE GET'S THE FAMOUS F70. In cases like this, use the damp dry selection and that works great - or better yet just use the timed dry selection with low heat.
We just have to understand that someone sat down and figured out what and how they wanted to program the computer that determines how this particular machine is going to react.
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!
Posted on Mar 03, 2010
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