NighthawkBlue

1. Checked heater core for cloggage and it was kinda gross. No solid chunks but coolant was just kinda discolored, a little bit soupy looking. Flushed heater core 3Xs, replaced with clean new coolant.

Now what?
The round cold/hot tempature knob?
Thermo fan switch? http://shop.advanceautoparts.com/buy...-201-1650.html

What should be a checklist?
2001 CLS

fsttyms1

have someone turn the knob from hot to cold and back while you look under the hood on the passengerside near the firewall. There is a small valve that should operate when the person turns the temp knob. If that isnt moving that is your issue.

Karanx7

iTrader: (2)

It's HOT as fuck in Cali, why do you care lol?

Karanx7

iTrader: (2)

I'd run HVAC self diagnose. Might just pinpoint it.

yungone501

iTrader: (4)

This. Most common issue for heater inoperative issue on 2G TL's (as well as earlier Honda's also).

If valve isn't moving, you might have a bad heater valve linkage actuator (electro-mechanical component that's controlled by the HVAC control head). If it is moving the valve, the heater valve may be stuck closed. If this is the case, try replacing the valve or even bypassing the valve with a heater hose splice kit just for testing.

fsttyms1

I was wondering that too, why would anyone want heat this time of year lol.

NighthawkBlue

Any brand valve gonna work or should i search out an OEM or Bosch or?

Stealership wanted $54. Did not i.d. brand.
Oreillys local walk in has Murray for $34 (photo included)
http://www.oreillyauto.com/site/c/de...&keyword=74780

AutohausAZ has Metrix (OEM) for 12.50!!!!
http://www.autohausaz.com/search/pro...ontrol%20Valve

NighthawkBlue

Do i have to explain my driving around naked at 3 a.m.?

fsttyms1

No, Nor do i think heat at that time of day is necessary this time of year

Karanx7

iTrader: (2)

Try the cheap one, or check the price on our online vendors website. OEM parts are a LOT cheaper online.