Go Back   Club Lexus Forums > Lexus Model Forums > RX Models > RX - Second Generation > Hybrid Technology
Sign in using an external account
Register Forgot Password?

Lexus Rh 400 2008 questions

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 03-07-10, 04:56 PM   #1
priyasrik
Driver School Candidate
Trader Score: (0)
 
Join Date: Feb 2010
Location: TX
Posts: 8
Default Lexus Rh 400 2008 questions

We just bought a Lexus RX 400H 2008 model with 14K miles for 35,888.

While driving back from our dealer ( 300 miles from our city), we noticed a couple of things:

1.The temperature kept blowing cold air till close to 77. The outside temp was 61.

We felt it was a little weird that we had to turn it up to 80 or so to get hot air. Is this a problem? Any insight is appreciated.

2. The MPG on the panel kept showing close to 22MPG but when we did our quick calculation, it came close to 27. Is the display not tbe trusted at all?

thanks a lot.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
priyasrik is offline   Reply With Quote
Old 03-10-10, 11:07 AM   #2
BobBass
Pole Position
Trader Score: (0)
 
BobBass's Avatar
 
Join Date: May 2006
Location: PA
Posts: 257
Default

You should not have to set the temp at 80 to get "hot" air. I have found the HVAC system on the 400h to be very good and pretty much "set it and forget it." I AM into turning the compressor off whenever possible (dry winter conditions and early spring/late fall) and ALWAYS for the last minute or so in the summer before parking the vehicle.

If you're new to hybrids and want to squeeze maximum MPG out of it, you will turn the HVAC OFF if conditions warrant. It's always interesting; if you pull up to a red light, the CAT converter is fully warmed up but the coolant still has to be warmed up to deliver heat and you have the HVAC set to heat the interior, when you push the "OFF" button, the engine will instantly shut off.

As far as the MPG readout, I have never checked mine using the "manual method." I think most owners say the readout is fairly close...certainly within 1 mpg.
BobBass is offline   Reply With Quote
Old 04-18-15, 02:17 PM   #3
lexusNUA
Driver School Candidate
Trader Score: (0)
 
Join Date: Apr 2015
Location: FL
Posts: 2
Default

I have 2008 Rx 400h; 131,000 miles sometime I notice it is blowing hot air while I set it to 70 and outside temp is 82 degree. Sometime it signals WATER TEMP. Lexus mechanic said may water pump problem and ask me pay almost $1800. Any suggestion.
lexusNUA is offline   Reply With Quote
Old 04-19-15, 08:25 AM   #4
thomas1
Lexus Champion
Trader Score: (0)
 
thomas1's Avatar
 
Join Date: Sep 2006
Location: Sacramento, California
Posts: 2,423
Default

I serious doubt it is a water pump problem. Probably has more to do with climate control servos that actuate the blend doors in the heating and cooling under the dash. As for Water temp, have never had that, but I would surely make sure that you are not loosing coolant from your radiator. If you are it could be a radiator leak or yes the water pump leaking but these would result in coolant level going down.
__________________
1999 RX300
2008 RX400h
Moved up to hybrid land

super home mechanic
Protect our Constitution, Tea Party
Papa to 9, 7 girls, 2 boys
thomas1 is offline   Reply With Quote
Old 04-19-15, 08:25 AM
 
 
 
 
Reply


Tags
2008, 400, audio, forums, heat, hybrid, lexus, manual, options, owners, rh, rh400, rh400x, rx, rxh

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 05:54 AM.

Join ClubLexus

Copyright © 2000-2015 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info