customer turns heat on says it dont work like it did last winter,code says out on high pressure,reset unit runs about 30 seconds and high pressure switch opens.bad expansion valve? dirty filter?blower not running?control board? no it sucked the insulation off the door up against the motor side of the blower,next time i installe one of these units iam gonna save myself a service call and tape the insulation to the panel like they should at the factory.I cut about a 1/2 inch of the insulation off the panel,enough to get the foil tape on metal and it holds it on there pretty good.