2000 Ford Expedition Heater

Tiny
NELLYNELSON1976
  • MEMBER
  • 2000 FORD EXPEDITION
  • 200,000 MILES
Still trying to figure my heater issue on my 2000 ford expedition. So I allready flushed the core, changed thermostat. And just checked my blend door and its working correctly. Felt the heater core why I was checking the blend door and it is barely lukewarm. Does anyone know were to check from her im stuck. And its going to snow soon. Thanks for any input
Do you
have the same problem?
Yes
No
Wednesday, October 30th, 2013 AT 5:41 PM

7 Replies

Tiny
TY ANDERSON
  • EXPERT
When the engine has warmed up, turn on the heater and feel both hoses going into the firewall under the hood and see if both hoses are hot. This will tell you if enough coolant is flowing through the heater core. Let me know what you find.
Was this
answer
helpful?
Yes
No
Wednesday, October 30th, 2013 AT 6:01 PM
Tiny
NELLYNELSON1976
  • MEMBER
Hi Ty I did check the hoses and they are warm but not very hot.I can grab them and hold them without it burning me.
Was this
answer
helpful?
Yes
No
Wednesday, October 30th, 2013 AT 6:31 PM
Tiny
TY ANDERSON
  • EXPERT
Here is a list of components that can cause low heat output:
A wrong temp rated thermostat will open too soon will cause low heat output (I know you just replaced it). A incorrect 50/50 coolant/water (more coolant than water) mix will cause a low heat issue. Temperature blend door half open or closed will cause a low heat condition. Air stuck in the heater core will cause a low heat issue. Restricted heater core will cause a low heat concern.

Does the engine get up to operating temperature? Does the radiator hoses feel the same as the heater hoses?
Did any debri come out of the heater core when you flushed it?
How did you check the temperature blend door? Did you see if the actuator is moving and/or remove the actuator and move the door by hand while the blower fan is on?
Was this
answer
helpful?
Yes
No
-1
Friday, November 1st, 2013 AT 7:13 PM
Tiny
NELLYNELSON1976
  • MEMBER
Hi Ty I had a shop replace the thermostat and they did a coolant flush and said they flushed the heater core to. Than they wanted to change the actuator doesn't the actuator just control the blend door? I checjed the blend door by opening up my glove box and cutting out a little section. And why I was turning the temp knob I could see it opening and closing. And I felt the core and it wasn't hot.I checked my heater hoses again yesterday and they were really hot. Is there a restrictor or control valve.I'm really lost? Could it be the water pump? Do I take the hoses off and check them. It breaks off with a t conection for the back of thr car heating. But the back heating is the same to barely lukewarm.
Was this
answer
helpful?
Yes
No
Saturday, November 2nd, 2013 AT 10:21 AM
Tiny
TY ANDERSON
  • EXPERT
I think you have a restriction somewhere in the heater hose pipping. It's not the water pump or the engine would overheat or the pump would be leaking coolant. Ford used a valve on the heater hoses for a long time but I don't think yours has it. From what I've been able to find your heater hose has a flow restrictor to reduce flow of coolant and pressure to the heater code during high engine RPM (it reduces noise and steps down the pressure to the heater core). The items I mention earlier are typically what causes no heat.
When the engine has warmed up like after coming home from a trip, with the engine running feel all the heater hoses all around and feel for temperature differences specifically in areas where it is hot and then turns cooler (except the heater hoses going into the heater core and the other hose coming out. Because the heater core is a heat exchanger there will be some temperature difference but not dramatic). This will point to an area that is causing low to no coolant flow.
I feel it is a restriction because both the front and the auxiliary heater are not blowing hot heat.
Was this
answer
helpful?
Yes
No
Saturday, November 2nd, 2013 AT 11:35 PM
Tiny
NELLYNELSON1976
  • MEMBER
Hi Ty its Justin again I'm going to check the hoses. But I was thinking maybe its the water pump the propellers might be worn off and its not generating enough pressure to get through the cores strong.I grabbed the hoses and the inlet gets pretty hot up until the t than its not that hot. But I can squeeze and bend the inlet hose like its not getting a lot of pressure. What are your thoughts? Its starting to snow here so want to get something done. The mechanic that flushed my core I told him about the water pump and he said you know what I bet your right because he said it wasnt getting good pressure all the way to the cores. Looking forward to your input I'm running out of things to check. Thanks a ton for your help really appreciate it.
Was this
answer
helpful?
Yes
No
Tuesday, November 5th, 2013 AT 5:16 AM
Tiny
TY ANDERSON
  • EXPERT
It looks like you have a restriction at the t area. But before that, lets assume your water pump is not pumping, the engine would overheat due to no coolant circulation. Is doesn't seem like your engine is overheating. Lets assume your water pump is weak. Two things, if the impeller is the cause of reduced pumping it is usually due to the fins on the impeller breaking (plastic and or rusted metal) second, if too much clearance is created between the impeller and water pump housing adjacent to the impeller it would reduce pumping (if this is the case usually it is due to water pump bearing failure and coolant leaks).
When the engine is warm, have someone rev the engine in park up to 2,000rpm and hold it there then check the t fitting again to see if the temperature changes. If it does, good if it doesn't change temperature you have a restriction. Do this at the heater connections at the RR of the vehicle to feel if it is hot also. Have the blower on hot and blowing to see if the temperature of heat blowing out the vents is hotter with revving.
It doesn't sound like a water pump issue to me it sounds like a restriction or air trapped in the heater core.
I hope this helps, let me know.
Was this
answer
helpful?
Yes
No
+1
Wednesday, November 6th, 2013 AT 5:11 PM

Please login or register to post a reply.

Recommended Guides