Came out today to perform one system HVAC service call. Upon arrival, customer stated that they had no heat. Upon first inspection found the breaker to be tripped. Upon inspection of the indoor unit found that the heat strips were 15 KW and the main power running to the system Was not ran up to code. Upon further inspection, found the blower wheel to be dirty. The filter in the system was not the correct filter. Customer will need an electrician to come out and give a quote to run the proper size wire and install the proper size circuit breaker For the system. At this time system is turned off due to high risk of fire due to the improper sizing of the wire.