We don't get involved with costs here because there's too many variables. You can look up the parts on any auto parts store's web site. That will give you an idea, but you'll pay more at a repair shop, just like you pay more at any other retail store.
Replacing the resistor assembly usually takes just a few minutes. The fan motor could be a simple job or very involved. I never did one on your model, but any repair shop can give you an estimate. Most of them go by a "flat rate" manual that lists labor times for each procedure. That way they all charge you for the same amount of time. Only their hourly charge will vary.
You have to remember that the cause of the problem hasn't been properly diagnosed yet. I only went by the symptoms you described. You could have a bad switch assembly too, especially if you use the heater fan on the higher speeds a lot. That increases the current flow through the switch and can easily overheat the contacts. That can result in one or multiple speeds not working at first.
Wednesday, November 11th, 2015 AT 6:58 PM