I have a similar problem. My LH TURN TRIGGER will not work all the time time. It will not depress no matter how much force I use and the machine keeps going straight. This is a dangerous situation that makes snowthrowing with the 2011 Husqvarna 1827EXLT a hateful task. The machine won't turn when I want it too. When this happens while I am backing up I sometimes get trapped against obstacles like a rock wall.
To turn the machine left I have to release the TRACTION DRIVE CONTROL LEVER which stops the machine and then the LH TURN TRIGGER will work.
This problem happens about 25% of the time I try to turn left.
I visited my local dealer who I bought it from and they looked at the prints and said there is no logical explanation for this behavior. I asked them to contact Husqvarna to find out if there is a service bulletin on this but they never got back to me.
I contacted them today again, after a season of using the machine - despite the problem, and they said they do not work on snowthrowers now (May) and to contact them again in the fall when they work on snowthrowers again. I asked if they can at least contact Husqvarna and see if there is a service bulletin and they said they were too busy and besides, they would need to experience the problem themselves before calling their Husqvarna service rep.
Does anyone have a answer to this problem?