readkirkpatrick
NAXJA Forum User
- Location
- Colorado
new to me 1999 Cherokee Classic is blowing cold on a non-A/C outlet setting and the air temperature selector to FULL heat.
A couple of interesting, but possibly not relevant facts:
o the heater hoses (2) do not get hot like the large diameter engine to radiator hose with the engind a operating temperature
o recently purchased the jeep so I have no repair history
o both the heater hose (engine to core) and return hose (core to engine) appear to be new with screw-type hose clamps. Also the gasket on the thermostat appears to be a amateurish job. (I am speculating that some one tried to fix the no-heat problem by replacing the thermostat and hoses)
o dealership told me that the 99 has no heater control valve and that the flow of water to the core is constant with heat being controlled by the heater door mechanisim.
I am leaning to a core replacement but would like to test to see if it is blocked.
Questions:
1. Would water from a garden hose pass directly though the core if both ends of the hoses are diconnected.?
2. Is there another way to test the core flow?
3. How would you test a heater doors to see if they are working?
4. Any other ideas?
A couple of interesting, but possibly not relevant facts:
o the heater hoses (2) do not get hot like the large diameter engine to radiator hose with the engind a operating temperature
o recently purchased the jeep so I have no repair history
o both the heater hose (engine to core) and return hose (core to engine) appear to be new with screw-type hose clamps. Also the gasket on the thermostat appears to be a amateurish job. (I am speculating that some one tried to fix the no-heat problem by replacing the thermostat and hoses)
o dealership told me that the 99 has no heater control valve and that the flow of water to the core is constant with heat being controlled by the heater door mechanisim.
I am leaning to a core replacement but would like to test to see if it is blocked.
Questions:
1. Would water from a garden hose pass directly though the core if both ends of the hoses are diconnected.?
2. Is there another way to test the core flow?
3. How would you test a heater doors to see if they are working?
4. Any other ideas?