You have an airflow problem or the water isn't being pumped away properly.
Unplug the appliance.
Take out the condenser, is there a pool of water behind it?
Reach in and check the ductwork.
Take out the filter and look into the slot it fits in.
Is there a lot of fluff visible?
I know which model it is, I have the service manual open on my computer.
If there's not water puddle and there's no visible blockage then I would suspect the fans aren't pushing air around.
Unplug the appliance and take the top and right side panels off.
Take the bulged cover on the rear off.
Clean out any fluff build up and check the rear fan is secure on the motor shaft.
Take the cover off of the front fan and check the same.
Let me know what you find.
Good luck with it.
As long as the ductwork is clear and the fans are running you should get an even heat through the appliance.
Thanks for letting me know how it went.
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Good luck with the appliance.