I have an 86 240 wagon which i replaced the heater control valve with the plastic kind from fcp groton. with the old style hcv, i had either hot or cold. the car has a new volvo oem w/p, too. the heater hose to the hcv is hot. so no problems up to the hcv.

the new hcv is installed correctly, but now, when switched to full heat, i have fair heat on the 2 passenger side vents (better when the a/c is switched off), but cool air is coming out of the 2 driver's side vents.

i've checked the archive here and bentley's, but so far information is inconclusive. i'm pretty sure i don't have a heater core leak. the last thing i hope to hear is to replace that buried heater core. any ideas?

Thanks!!
BC Golden (bc1_2002)
86 245 230k+ mi; original owner