yardbuzzard

thanks

Flush the heater core extremely well if bleeding the system does not work.

something that quick, I would check the fuses.

does anyone know if wheels for a GS 300 or 400 98-2000 fit a 94 LS 400? thanks in advance.

I went through everything like you did. Turned out it was a nearly clogged heater core. A determined mechanic spent 3 hours with solvents and air until it was clean. He said it was amazing at the amount of junk that came out of it. cost me a bunch but now it heats as new. And by the way, change your cabin filter if you have not done that in a while. Really helps the fan blow some serious air.

My 94 LS 400 has a need for a replacement by pass pipe due to corrosion. It is the pipe that attaches to the upper radiator hose that actually goes to the thermostat housing and both heads. Anyone got a spare motor that might have one of these? thanks in advance Bill in NC

Heater door control? How do you test this or get to it? My car is cool at idle but warm at higher rpm/s. Replaced tstat, rad. cap, burped system. No better. It is intermittant. thanks

I've finally got back to the car. I've checked the hoses repeatedly, and they both are extremely hot. I changed the cabin temp sensor, and still no heat. Lets see, I've replaced the thermostat twice, cleaned the heater valve twice, replaced all hoses (plus blew everything out), flushed the system and refilled twice (because I'm clumsy), burped the system I don't know how many times, removed, checked, and replaced all fuses and relays. changed the cabin temp sensor, checked for error codes, and still no heat. I've got the dash in shambles just checking wiring, from what I CAN see, everything on the controls seem to be working ok. SOOOOOOOOOOO I guess I'm going to have to send it in to have it diagnosed. It's snowing here today so driving with NO heat was a bit contrary to good sense. Maybe one day, the problem will be solved. Thanks again for ALL suggestions. Keep'em coming because I've got to wait until I've got the money to send it in, and with it being Christmas, that may be a while. Again, I really do appreciate any and all ideas. THANK YOU! put the temp on max, warm the car up, fan on max. Mine does the same thing. I have gone through the same diagnostics, new thermostat, cap, flush, burp, disconnected battery, Mine will get warm at higher revolutions but blows cold on idle. Sometimes it will quit heating at running speed. Sounds like climate control somewhere but I have yet to hear if anyone has fixed this problem with replacement of climate control...anyone out there? Thanks in advance. Closest dealership is 2 hours away and then how long to leave it, etc. Any help appreciated bring the RPM up to about 4000-4500 and hold it there. hot air? if so, you either have a bubble in the system, a leak somewhere (i had one that was TINY), a dead thermostat, or all of the above.