Jeep Wrangler 2015 no heat heater core was flushed still no heat what next

SOURCE: 94 jeep wrangler overheating

Have the cooling system pressure tested. If it holds pressure, that's a good thing. If it doesn't hold pressure, you may have a leaking head gasket. What may be happening is the crack in the head gasket could be blowing hot air into the cooling system causing it to overheat.

SOURCE: heater only blows warm air.

The hoses from your heater core should be very hot to the touch. Check the hoses going to the core from the water pump. It should be very hot. The return hose should also be very hot. Now check the hoses going to the core. If they are not the same temp, then your heater control valve is not working correctly or the vacuum is not working. At any rate, locate the vacuum line going to the heater valve. Remove the silver bar on the valve from the plastic plunger arm. You will have heat all the time now if it was only a vacuum problem. You can fix it later when it's warmer out. BTW a 200* thermostat will make your heater even hotter.

SOURCE: 1998 ford f150- heat issue

There is no heater valve on a 1998 ford F-150. The hoses for the heater lead directly from the engine and go to the heater case. PS The heater doors are all vacuum controlled so you might wanna look under the dash for any lines that might be disconnected

SOURCE: how do I replace a heater core on a 1998 jeep wrangler

An addtion to the above Check to be sure the radiator level is full first.

Chris Briggs

• 160 Answers
• Posted on Jan 07, 2010

SOURCE: I have a 1997 Saturn SL2. I have no heat. We

It is your heater core, there is nothing else left.

The heater housing is usually under the dash, and it must be removed to gain access to the heater core.Procedures for removing a dash, and heater core vary. But for the core:
The heater housing must be removed, and then you
"remove the panels" or "split the case" (Usually screwed together.)
Remove the coolant hoses, the cable and vacuum control line.
Remove the heater core bracket and clamps.
To install the new heater core, reverse the removal steps.
Core leaks **** because of the core's location deep within the firewall/ dashboard of the car.
So remember to liquid test your new one before you put it back in, or you could be sorry.

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