Mercury Repair Questions? Ask a Mechanic for Answers ASAP
Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
Did this issue occur right after the water pump was replaced?
Let me know so we can continue,thanks Pete.
Does your model have the auto electronic temp control or just manual controls for the front heater control system?
O.k.,my info on this is very limited unfortunately.I believe you have a temp actuator for the rear that can fail but I dont want to say this for sure.Others here may be able to assist further on this.
I will open your question up for others here to see if someone else can assist further on this as there may be others here that may have more info on what to check or do with this issue.I hope you can get this resolved with ease.No need to reply to my last post here unless it is a last resort as it will keep your question locked to me and others will not be able to view it.If you feel you want to continue to work with me on this feel free to reply at any time but keep in mind in some cases it can be difficult to fully diagnose or help repair this without seeing your vehicle.
Hello, does the rear air temperature stay the same regardless of the temperature setting? If you put your hand on the rear heater pipes going ot the rear heater core under the vehicle, are both pipes fully hot and the same temperature? The rear blower fan operates properly just no control over the temperature setting?
Ok that is a quick simple thing to check once the vehicle is at normal operating temperature and the front heat is working properly. Sometimes an air pocket can develop in the system when the cooling system has been opened up during the water pump repair. More than likely both heater inlet and outlet pipes are the same temperature and hot. If not there may be a restriction in the system.
That is how you would normally test the system. But from everything I have read, it does not appear to have rear heat, only rear air condtioning in this vehicle. There are no publications from Ford/Mercury regarding repairing the rear heater system, only rear air conditioning. So verify if you have rear ac and rear heater lines going to the rear of the vehicle. If there are only a small and large ac line, you dont have rear heat installed.
Do you need more help with this concern?
Typically there is both a rear heater core and a rear evaporator for the ac system. From what im reading in the Mercury service manual it doesnt reference any type of rear heater system, but only a rear ac system in its whole manual or repair section. So it is unusual but looks like you dont have a rear heating system. If it does, there will be 4 lines going to the rear ac box, two the same size for the heater core and a large and small line for the ac system