One controller is above the rear view mirror. One or a combination of these factors is likely the culprit in your case. Also, do you have an idea where the vacuum hoses are located. The Expedition does not use a heater control valve to regulate flow through the heater core. Remove the bolt and wire plug, and the coil will pull up and off of the spark plug. A friend of mine had hisdisconnected after servicing at the dealer.
If the heater hoses are cool, there's no flow through the core. Just tried, and where the heck is that control valve?. The problem is being caused by a vaccum leak either at the control unit or somewhere along the vaccum source line. Look for a unplugged hose or a cracked or dry-rott … ed hose and replace as needed. Just remembered that a few weeks ago while driving, I felt water on my feet as I was driving although I wasn't sure where it had come from. Not sure if there is a heater control valve in that ride, probably is, you may not be getting any water through it to allow water into the heater core. If, as already suggested, you can feel the heater core and it's.
Check to see that the engine coolant is at the proper level. The rear air is noticeably cooler. To be honest, I am lost. Think it's the heater core? Coupla main reasons - plugged core - bad heater control valve - missing vacuum lines - etc. If your engine is stock I would stick with the factory recommendation. Best check for leaks on both side of the firewall. That side also has number 4, but number … 4 is all the way at the back.
You may have a blocked or leaking heater core. If both going into the firewall with engine temperature at mid range should be too hot to handle on both hoses if the core is operating properly. It could also be the heater core is plugged. It is located under the hood on the lines that feel the heater core, it is vacuumed controlled also so check for vacuum to make sure it's moving. It is slightly warmer than cold and the temp guage is reading normal.
I have the same problem. You will have to remove the screws and the electrical connectors for e … ach one and gently pull up on coil pack to remove it to access the spark plug. It will pressurize itself once u start the engine and let it run a little bit. Warning this is not a small job! If it is bad enough may need to remove and spray out the rubber hoses from the motor to the heater core, and possibly remove the heater core and hose it out to make it flow better and therefore increase the heating ability. You need to check that the radiator is full, not the overflow tank, the radiator. These are lubed for life, not greaseable. I am working on daughters 1999 Expedition Eddie Bauer with climate control system and trying to determine what I should fix.
The whole dash has to come off clear to the firewall in order to get heater core acess. I didn't read in your post that you checked the coolant level. Does the blend door have any affect on the rear heat? Joe I have a 2000 ford expedition that has had no heat for the last two years. If it is not hot: the heater core may have an air pocket the heater core may be plugged. Both told us the same thing.
Heat like you would not believe! All in all it probably is a vacuum leak somewhere you will just have to go through the vacuum system for the climate controls, yes it is time consuming but that will be the only way to find and fix the problem without throwing a lot of money changing parts you think might be bad when all it was is a leak. Please post in your browser if it does highlight and confirm the door position. In addition to the above video being helpful this video was also helpful as I don't have a radiator cap. Let me know what you find. I cannot hold on to either hose for more than 2-3 seconds. Please help I have a 01 ford expedition that's driving me insane I have no heat very lil warmth at 2000 rpms lets see new heater core new water pump new thermostat flushed block when idling its cool arm not warm mode doors are working checked all then when heater core as replaced yesterday the heater hose going in core is hot one coming out is not that tells me it's not circulating thru heater core but why it's all new other then radiator thanks and help will be appreciated! Jimmy answered about a year ago U must have radiator cap because the system needs to be pressurized.
I checked the knob on the ac controls and it is not cracked or damaged. . If so then you have vacuum present which is good. But make sure the heater is set to full heat when you flush it while driving around the block with flush in it so the small radiater that has the hot water flowing through it gets flushed too. Did you ever figure out the solution? I checked the water flow out of the front of the motor to the heater cores and it was pretty decent but I put in a new water pump to be safe. Please advise if I should do something else before I put any money into replacing components that are probably good. They should be hot to the touch 200F give or take in order for you to get heat.