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Other problems may derive from improper cabinet assembly, power interruption or surge, low line voltage (less than your unit rating of 105V or 240V), or failure to clean the unit regularly (see illustration below). The following may help you determine what the problem may be; what steps you can take to correct it, and what further steps may be required. Additional Trouble-Shooting information and downloadable documents are available in the “Support” area of our web site: Cleaning the coil IMPORT