Over time, condenser coils often become plugged or fouled with dirt, grease, weeds, cottonwood fuzz, or simply layers of dust. These conditions will cause poor airflow through the condenser, which will elevate the condensing temperature and pressure. Inoperable condenser fan motors or damaged condenser fan blades will also cause high condensing temperatures and pressures. In fact, improper placement of a condenser coil — or any condition that may cause improper airflow across or through the condenser coil — will elevate condenser temperatures and pressures.