4-prong 30A 14-30R outlets are commonly found in homes built after 2000 for a dryer power cord 4 prong compatible. You may find that an older 3 prong dryer plug doesn't fit a newer-style 4 prong ...

Gently pull the vent pipe away from the wall duct. If your dryer is electric you should be able to push the appliance out of the way without any issues. This will open up more space to work.