Some medicines, tricyclic antidepressants and antimalarials can also cause darkening of your gums. The nastiest is the effect of acute necrotising periodontitis (sometimes known as trench mouth) which is advanced gum disease and the black colour is the result of dead tissue.
The average cost for a heater blower motor replacement is between $289 to $413. Labor costs are estimated between $119 to $151 while parts are priced between $170 to $262.Get a personalized estimate based on your location and specific car.Estimate does not include taxes and fees.abor costs are estimated between $119 to $151 while parts are priced between $170 to $262. Get a personalized estimate based on your location and specific car. Estimate does not include taxes and fees.
1 Replacing the fan motor for your AC unit professionally for an existing air conditioning unit can cost anywhere from $300 to $600 depending on the model of the fan motor. 2  This will include checking the kind of unit, the voltage, the phase and the running load current to make sure that the fan motor does not fail.he fan motor for your AC unit is an integral part of the air conditioning system. Without the fan motor, the fan would not spin. This means that the cold air produced by the air conditioning unit would not be propelled out of the unit and into the home or building.