The wife and I just upgraded our 20 year old Kenmore washer and dryer, which were mismatched from the house we currently live in, for a new Bosch unit.  We purchased our washer and dryer unit from East Coast Appliances.

The installers carefully removed the two old units and carried the two new units up to our second floor.  They reconnected all the hoses and cables and turned the units on for the first wash cycle and drying cycle.

They then went downstairs to install the new refrigerator as well.   After they left, the wife and I noticed that the dryer unit had an E:01 message displayed on its LED.  We didn't think much of it and shut the unit off and restarted to test how well it would dry our clothes.  After about 3-4 minutes, the unit beeped and displayed another E:01 message.  Since neither one of us had read the manual yet, we thought we'd break it out and see what we were doing wrong.

The troubleshooting section mentioned to check the "Lint Filter", "Exhaust Hose", or check for correct "Ventilation" to the unit.   None of this quite made any sense to me, since we both cleaned everything up when the old units where removed and we never had any problems before.  I played around with relocating/moving the vent hose to see if there was any kinks or anything in it.  It was a new hose that was installed with the unit, however.

After fighting with the E:01 errors for about 1 hour with the unit running for 3-4 minutes, beeping... and me resetting and restarting... I finally got fed up.  After all, nothing was wrong with my new washer/dryer, and here I was upgrading to a new one that appeared not to want to stay on.

Since there had to be a logical explanation for my issue, I thought I'd remove the vent hose from the wall and put one of my wife's hose stockings on the end.  This would eliminate anything in my house causing a problem.  I turned the unit on and let it run, and it ran for a complete cycle.  Wow!  I guess it was my vent!

I then went to Home Depot and bought a dryer lint brush.  They didn't have anything very long, but I figured it was better than nothing.  I then went home and shoved it up the vent to see what treasures I could find.  I was able to pull out about a handful of lint.  I reconnected everything and tried the dryer again and, once again, it ran for 3-4 minutes and displayed the annoying E:01 error.

My next trip was up to the attic to see if there was any way I could get to the pipe and clean it out.  Since we recently moved into our house, I have not had the opportunity to trace every cable and wire to see where things go.  At any rate, I quickly located the vent pipe and noticed that it was connected up to the roof.  I then was able to pull the pipe away from the vent cap on the roof and again was able to pull out about 2 handfuls of lint.  I also played with the lint door to make sure it was moving in and out easily.  I then reconnected everything and dashed downstairs to try the dryer again...

Victory at last!  I have been successfully dryer my clothes all day long (different loads, mind you!)

Of all, I've been very impressed with this unit.  It's nice looking.  It's quite.  It's very fast in drying.  The only thing I wish I had more understanding about was how super-sensitive these new digital units are compared to the old mechanical dryers that didn't have any sensors or anything.

I suppose my old dryer wasn't pushing the air outside as well as it should.  The new dryer detected this flaw and notified me right away.  Potential fire hazard?  Maybe -- there is no way to know for sure, but I can at least feel better now with having the dryer on and knowing that it's checking the lint trap, vent house, etc., for me and will alert me when things go awry.

I think the sales folks at the stores should be more up front with these sorts of issues.  Clearly, older homes--especially the ones that the dryer doesn't sit on an exterior wall and only has about a 6" pipe to get outside--are likely to have more issues with these units than newer ones.  The installers that come out to your house to install these units should also know to look for these things and at least mention them to the home owner.  I was very frustrated and almost wished I hadn't bought eh units, by not knowing exactly what the problem was.

End the end, I'm glad for my purchase.  If you have a Bosch or are thinking about buying one, and you later run into this problem, I hope this blog post helps!