Tough Question!

Your 140 degrees has a plus or minus of 10 degrees, so technically you are within specs but just barely. Have you calibrated your temp testing equipment?

If you want to follow it up you can

1. Test exhaust temp on other settings.

2. Test the thermistor for resistance at various temps.

and post the resuslts and lets see what we have.

Unless you feel you are having a major problem with drying times or energy consumption I would tend to let it go and see if the situation stabilizes or deteriorates.

Thanks for the info

You know you never said what caused you to do the tests, and now I am assuming your problem was a long drying time and you were testing temperature to see if that was the problem. I do not think it is.

If you were able to dry a large load in 40 minutes with the vent detached on medium heat, I think that is very satisfactory performance. If your drying times are long when the vent is hooked up to an exhust system that has turns and goes 90 degree up to your roof, then I think that is your problem. I very strongly recommend that you find a way to direct vent your dryer, and if not, substantially reduce the length of the venting. No matter what the specs or manufacturers say, these machines are meant to vent horizontally, or vertically with a relatively small rise. Remember, you are trying to push heavy, wet air out the venting system.

See what your options are for venting, and if you can reasonably and inexpensively have a shorter, more direct venting I think it will solve your problems.

Good luck and let us know what you do.

Sounds like a good idea.

You should tell your wife that this is a safety issue as well as a drying issue, and that in the extreme she might have to go to a solar drying system (that's what we call a "clothes line")

Good luck, and keep us informed.