I have a Coleman Evcon electric furnace in a mobile home I rent. Recently a wire had burned off which caused it to produce no heat. After they sent a repair man to work on it I now seem to not have as much air force coming out of the registers. Also it takes 20 minutes to raise the temperature one degree. Surely this couldn't be right. My electric bill was triple this month. I realise it has been colder but I have my thermostat set for 69 during the hours I am up and at home and 60 for the night hours I am sleeping. Does anyone have any ideas on this?