EF3003, SF3003, DF3003 TROUBLESHOOTING GUIDE GENERAL Service Manual Problem Cause Solution Reference Circuit breaker trips Additional appliances may or fuse blows when exceed the current rating of unit is turned on the circuit breaker or fuse. Improper circuit current rating Plug unit into another outlet or install unit on a dedicated 15 amp circuit...
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EF3003, SF3003, DF3003 TROUBLESHOOTING GUIDE HEATER Service Manual Problem Cause Solution Reference Defective heater on/off switch Replace heater on/off switch Page 17 Heater is not turning off Improper operation See User’s Guide Loose wiring Trace wiring in unit Page 9 Defective heater on/off switch Replace heater on/off switch Page 17...
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EF3003, SF3003, DF3003 TROUBLESHOOTING GUIDE HEATER (CONTINUED) Service Manual Problem Cause Solution Reference Loose wiring Trace wiring in unit Page 9 Heater fan runs Defective heater on/off switch Replace heater on/off switch Page 17 continuously Defective heater assembly Replace heater assembly Page 18 NOISE Service Manual...