Lexus

Lexus troubleshooting questions? Ask a Lexus Expert

Ask an Expert,
Get an Answer ASAP!

I have 2004 rx330 heater only blowing, heater only blowing…

Customer Question
I have 2004 rx330...

I have 2004 rx330 heater only blowing cod

Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix with a Lexus. The Lexus Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so he can help you best.

Heater only blowing cold air, sometimes when car is running it will start blowing warm air?

Mechanic's Assistant: Are you hoping to fix this yourself?

Yes

Mechanic's Assistant: Great! What have you tried so far?

Nothing

Submitted: 2 years ago.Category: Lexus
Show More
Show Less
Ask Your Own Lexus Question
Answered in 5 minutes by:
3/6/2016
Lexus Mechanic: Pete, Technician replied 2 years ago
Pete
Pete, Technician
Category: Lexus
Satisfied Customers: 33,356
Experience: Over 17 years diagnosing and repairing automobiles various makes and models with some training and certifications.
Verified

Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.

The first thing to check here is to make sure the engine coolant level is at the proper level.If there is an issue with low coolant this indicates a leak that needs located and repaired and will cause this issue as it forces air and coolant into the heater core causing the cold air and intermittent warm air.

The coolant system would need pressure tested with a pressure tester to locate and repair this.

If the coolant level is o.k. this can be due to a restricted heater core.You would want to feel both heater core hoses going into the firewall to the heater core with the engine warmed up and running and heater on.Both should be very warm to hot to the touch and should be about the same temp feel.If one is allot cooler then the other then this indicates a restricted heater core needing replaced or flushed out.

If the heater core hoses are both hot then the only other issue that is common is a faulty temp door actuator on the heater box itself needing replaced.This would need checked further by having the codes checked first using a scan tool that will plug in and communicate with all computers to check codes and then the actuator signals tested to see if it needs replaced.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service.You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

Ask Your Own Lexus Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a lexus mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Pete Your Own Question
Pete
Pete
Pete, Technician
Category: Lexus
Satisfied Customers: 33,356
33,356 Satisfied Customers
Experience: Over 17 years diagnosing and repairing automobiles various makes and models with some training and certifications.

Pete is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU!

JugheadUSA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

lexpert

lexpert

Lexus Master tech

2,100 satisfied customers

Master Certified with lexus, 8 years experience with Lexus

Skyvisions

Skyvisions

ASE Certified Technician

1,848 satisfied customers

Lexus Expert

Ron Z.

Ron Z.

- Lexus Tech -

454 satisfied customers

18+yrs experience. State Inspector and Lexus Diagnostics

Chris (aka - Moose)

Chris (aka - Moose)

Technician

345 satisfied customers

16 years of experience

AMD

AMD

Master Technician

270 satisfied customers

L1 Advanced Level Diagnostics Specialist

George H.

George H.

ASE Certified Technician

224 satisfied customers

15+ years ASE Master w/L1 Drivability certification

Tim Mohr

Tim Mohr

ASE MASTER

129 satisfied customers

30 YEARS EXPERIENCE, FORIEGN AND DOMESTIC, GAS AND DIESEL

< Previous | Next >

Related Lexus Questions
I have a 2004 Lexus RX 330 with 120,000 on it. It was
I have a 2004 Lexus RX 330 with 120,000 on it. It was running great since I purchased it 4 months ago but recently I am hearing a whining sound when I start it and sometimes when driving it. Then I sm… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,862 satisfied customers
Having issues with it blowing cold after running idle after
Having issues with it blowing cold after running idle after a bit … read more
Pete
Pete
Technician
General auto certifications
33,356 satisfied customers
Want to replace my air ride suspension with coil over
want to replace my air ride suspension with coil over springs 2004 RX330 http://www.ebay.com/itm/Fits-2004-2006-Lexus-RX330-FWD-FCS-Loaded-FCS-Front-Rear-Strut-Assembly-/191777326535?fits=Year%3A2004%… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
The heat in my lexus rx 350 only put out warm air is when
the heat in my lexus rx 350 only put out warm air is when the car is running at least 40mph. anything lower it blows out cold air… read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
Heat not working in my 98 lexus ls 400 just blows cold air
Heat not working in my 98 lexus ls 400 just blows cold air was wondering what the problem might be?… read more
Kevin
Kevin
workshop foreman /master tech/mot tester
1 satisfied customers
My 04 lexus rx330 driver side blows out heat but my
My 04 lexus rx330 driver side blows out heat but my passenger side blows out cold air when the heat is on… read more
Tim Mohr
Tim Mohr
ASE MASTER
Master's Degree
129 satisfied customers
Lexus RX330: Could you send me step by step instructions on
Could you send me step by step instructions on how to replace the AC Heater Blower Motor on a 2004 Lexus RX330?… read more
HondaPlatinum
HondaPlatinum
High School or GED
148 satisfied customers
Lexus ct 200h: Hello, I haveXXXXX200h, I have problem
Hello, I haveXXXXX200h, I have problem with heater. I have only warm air at the passinger side and driver side is not warm air only. please let me know what would be problem?… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
Lexus LS400: 1996 LS400 will not blow warm air inside at idle.
1996 LS400 will not blow warm air inside at idle. It will put out some warm air going down the road at the speed limit. I did replace the thermostat and that was quite simple but I did not concern mys… read more
Mastertech 1
Mastertech 1
Lead Technician
Vocational, Technical or Trade Scho
1,755 satisfied customers
Lexus RX330: I have a 2004 Lexus RX330. I am getting an error
I have a 2004 Lexus RX330. I am getting an error code of 24 on the ac system. It is blowing cold air then warm air then cold air again. Research points to the Magnetic Control Relay being bad. However… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
1,848 satisfied customers
2001 Lexus GS300. The AC started working intermittently
I have a 2001 GS300. The AC started working intermittently since 3 months ago. It blowed cold air and will suddenly started blowing warm air. It will not blow cold air again. There are times I could g… read more
HondaPlatinum
HondaPlatinum
High School or GED
148 satisfied customers
2003 Lexus Es300: blink..it blows cold air intermittently
Hi There, I have a 2003 Lexus Es300. Last week the the a/c light would blink and the a/c would start blowing warm air. I replaced the a/c switch and it fixed the blinking a/c turning off but now it bl… read more
Genchi Genbutsu
Genchi Genbutsu
Vocational, Technical or Trade Scho
3,526 satisfied customers
1997 ES300: blows cold air..AUTO mode..the OEM radio/cassette..Lexus
The heater in our 1997 ES300 blows cold air in the AUTO mode or FAN mode. The only way to warm the car is to set it to HOT in AUTO mode and then turn AUTO and FAN mode off and patiently wait for heat … read more
lexpert
lexpert
Lexus Master tech
Vocational, Technical or Trade Scho
2,100 satisfied customers
2004 RX330: vents..the drivers side..blow hot air..passenger side
A 2004 RX330. The heater vents on the drivers side will not blow hot air until the temperature control is put over 85. While the passenger side responds with the appropriate temperature air. What's wr… read more
Genchi Genbutsu
Genchi Genbutsu
Vocational, Technical or Trade Scho
3,526 satisfied customers
2004 rx330: fwd..to a dealership..aftermarket seat heaters..removing
I just bought a 2004 rx330 with fwd. I live in CT and when I purchased the car, I realized that the car doesn't have heated seats. I've been told that I can go to a dealership and have aftermarket sea… read more
Genchi Genbutsu
Genchi Genbutsu
Vocational, Technical or Trade Scho
3,526 satisfied customers
Heats..vents..the driver side feel like the heat is..doesnt happen
I have an issue with a 2001 is 300 auto. In the summer time, the car heats up around the transmission case inside the car really hot sometimes, and where the vents are by the floor on the driver side … read more
Dodge expert
Dodge expert
ASE MASTER TECH, REPAIR FACILITY OWNER
High School or GED
3,636 satisfied customers
Air conditioning initailly cools , but after about 3 minutes
Air conditioning initailly cools , but after about 3 minutes it stops blowing cool air. After stopping the car and turning motor off the air will come out cool again for a few minutes then it the air … read more
lexpert
lexpert
Lexus Master tech
Vocational, Technical or Trade Scho
2,100 satisfied customers
Rx: 350 blows cold air after it..reaches..winter..degrees
My a/c heat system on auto in my rx 350 blows cold air after it reaches the set temperature - so in the winter if I put the heat on 72 at 72 degrees in the car it will start blowing cold air. I have t… read more
lexpert
lexpert
Lexus Master tech
Vocational, Technical or Trade Scho
2,100 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x