Thank you for your question and I understand your concern.
The dishwasher will need to be removed from under the counter top to remove and replace the drain hose.
Remove power to the dishwasher by flipping the house circuit breaker off for the dishwasher. Turn the water off
and then remove the screws on the lower access panel and remove the panel. Disconnect the water supply line from the water inlet valve. Remove the mounting screw to remove the electrical junction box cover. Disconnect the black, white and ground wire from inside the junction box. Remove the screw to release the strain relief bracket. Remove the nut securing the wires in the cable. Disconnect the drain hose from the sink or disposal. Feed the drain hose back through the cabinet. Open the door and remove the mounting bracket screws from under the counter top. You may need to removal the locking screw and the adjust the front legs up for more clearance. Carefully pull the dishwasher out from under the cabinet and be careful not to scratch the flooring. Remove the drain hose clamp from the back of the dishwasher and pull the drain hose off. Be aware of water coming out of the drain hose.
Reverse the procedure to install the new hose to re-install the dishwasher.
If you get to the point where you need to have a service technician to remove and replace the drain hose, you can schedule service through this link:
Sears Home Services.