I have a feeling clearing the code may have fixed it from the start. But when I back flushed it some gray fluid came out - maybe it was just junked up in the core. It heats the cab fine but not the high temp like my truck. I run it at 90 and in 5 min the cab is fine then I tunr it to 72-75. It d/n hurt pulling the pump apart and it was kind of cool to look it over.

Yep! I missed somethig, though. Do you have a dash panel fault indicated? BTW, I am betting against the heater valve being stuck. And, remember, the heater valve powers on to close.

What do you think about my methodology?
1) Clear self diagnostic code thru the temp interface on dash and rule out damper issues 2) test fuse and relays for pump 3) put properly polarized 12 VDC on connection to pump & solenoid - repair as necessary 4) back flush heater core or system 5) add coolant as necessary

Thanks Jim, you are the best!

Here is a weblink to Climate Control Fault codes (climate control self test codes):

https://www.dropbox.com/s/rhpmlrudia...Codes.pdf?dl=0

Climate Control Panel Interrogation Procedure
The control panel has a self-diagnosis feature, and is capable of displaying and clearing
stored fault codes.
Step
#1 Simultaneously hold AUTO & RECIRC - Switch ignition to ON
Result: Display element check
#2 Press AUTO
Result: Display of stored fault (NUMERIC) code. If ZERO appears, there
are no stored codes
#3 Press FACE
Result: Scroll through stored faults (maximum of 5)
#4 Simultaneously press FACE & R
Result: Clear stored fault codes (may need to be repeated for each fault)
#5 Press RECIRC
Result: Initiate actuator check
(Press FAN to skip actuator check) (Actuator codes 20 through
27*)
#6 Press FAN
Result: Exit error check mode

NOTE: * Actuator codes do NOT equate to system fault codes.

ReluctantMechanic
What manual mentions Electronic Control Panel (driver/owner handbook, vehicle care handbook???)?

The Electronic Control Panel mentioned. Is it the Climate Control?

The climate control system is equipped with self diagnostics. If a fault is detected, the symbol 'E r' will appear in the display accompanied by a series of beeps for five seconds.

Forward Drum sheared off. My Mech had a used one from a 2000 so I go it installed for 1400$ Runs great

1998 XJ8, gearbox fault & check engine code. Car was running like a scallded dog for a year after new plugs and removing sludge in exhaust ports. Then bam! gear box fault. She runs great in reverse if I could drive that way home from the pubs I would have no issue. After puutng in drive I get a big jars and she runs in limp mode under amber warnings. I did beat a school bus on a 30degree grade after 400 yards. Went to Aamco, they think it could be electronic or low fluid. She has not dropped a "snakes lick" of lubricants. Only 71k miles. Is it possible there is another soultion than a rebuild? The tranny guys were licking their chops when asking to leave it with them. This is a great car but I am in a delima to scrap it and buy a Honda. Please help me with your experiences.