Okay everyone, I’m lost. Been trying to figure out why I’m not getting any heat in the cruiser. Here’s what’s happening: if I have the AC on and turn it to full blast heat, I get perfectly hot air that comes through the vents for about 5 seconds and then it gets warm, and then it’s just cool air after 15-20 seconds or so. I can repeat this multiple times too, going from cold to heat and it’s consistently hot for a bit and then goes cool again.
After reading some threads on here I thought that my heater core may have been backed up but when I did a reverse flush it came out spotless. Roughly a cup or so of coolant came out and then nothing but perfectly clear water was flowing through. So unless I did it completely wrong (didn’t have water pressure up much at all because I didn’t want to cause any leaks in the heater core), that isn’t the issue. Blend door still activates when I turn the heat on, I can hear it hum and it goes from cold to hot momentarily. Heater valve is new and engages when turning heat on so that’s not the issue. Thermostat is also new as all that was replaced when I replaced all the heater hoses and did a rear heater delete. Brand new radiator, block and everything drained and flushed multiple times. Any ideas what could be the issue?
After reading some threads on here I thought that my heater core may have been backed up but when I did a reverse flush it came out spotless. Roughly a cup or so of coolant came out and then nothing but perfectly clear water was flowing through. So unless I did it completely wrong (didn’t have water pressure up much at all because I didn’t want to cause any leaks in the heater core), that isn’t the issue. Blend door still activates when I turn the heat on, I can hear it hum and it goes from cold to hot momentarily. Heater valve is new and engages when turning heat on so that’s not the issue. Thermostat is also new as all that was replaced when I replaced all the heater hoses and did a rear heater delete. Brand new radiator, block and everything drained and flushed multiple times. Any ideas what could be the issue?