苏州夏普打印机维修站电话696l6769,维修,售后服务 check thermostat, thermistor and put sim 14 # * C * 14 START 1 START H4 -Heat roller low temperature detection H4-01 H4 error pertains to lamp errors. that would either be the copy lamp or the heater lamp. check both lamps. with heater lamps,it's usually caused by either a broken heater lamp or a dirty thermostat on the heater roller assembly.