Question about 2006 Chevrolet Tahoe
You'll have to remove both heater hoses's running into the firewall. Place a container under the hoses Place a garden hose on one of the hoses and with only a little water pressure, let the water run thru the heater core and out of the other hose until clear water exits. No need to play with the heater valve to flush the heater core.
Posted on Jan 31, 2010
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Posted on Jan 02, 2017
SOURCE: not getting heat in cab
Is the blower running at all? Also, make sure the main air intake vent is free of obstructions.
Also, a vacuum leak could cause the actuator to not function correctly. I'd check into the vacuum lines if all else fails. I've had too many cars here with heat/air problems due to vacuum loss and the actuators not switching correctly.
Posted on Sep 10, 2008
SOURCE: flush heater core
PULL THE HEATER HOSES OFF IN THE ENGINE BAY, THEN USE A GARDEN HOSE AND FLUSH THE CORE IN BOTH DIRECTIONS, IF U SEE NO RUSTY WATER OR THE WATER GOES RIGHT OUT THE OPPOSITE SIDE U ARE FLUSHING U DON'T HAVE A HEATER CORE PROBLEM
Posted on Mar 24, 2009
SOURCE: No heat/defrost 01 corolla
Sounds like you have air trapped in the heater core when you flushed the heater core. loosen the upper most heater core hose and run the engine untill coolant seeps out. Wait until the coolant has reached running temperature.
Posted on Jan 18, 2010
SOURCE: flushing the heater core
I removed the hoses and took a air nozzle at low pressure and blew in the return hose connection of the core. A big chunk of paste like substance shot out then pure liquid. I put the hoses back on and tested it. Now its blowing hot!!!!!!!
Posted on Dec 14, 2010
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