Fan blower markedly weak in heater setting (and windshield de-icer) (1 Viewer)

[LCQ]

With cooler weather on the way...

Is anyone noticing the fan speed blowing significantly lower in the highest manual heater setting (rather than cooling) when set to upper body/face airflow? I think I've tried everything but maybe I'm missing something. Drive mode is set to "Normal," fan blower setting in manual mode at highest notch, airflow set to upper body, heat temp set to HI, S-flow off (concentrated airflow mode), and "eco air conditioning" mode off. Additionally, I've toggled the following off/on and they seem to have no effect on the blower speed either way: Rear System on/off, Recirculate on/off, and A/C switch on/off.

It seems like the culprit might be the airflow mode "baffle" not going into the right position when on high heat manual & upper body airflow mode. When set to defrost, the fan speed seems a bit more powerful.

Another observation. My 1958 does not have a "Windshield de-icer switch" but it does let me turn it on thru the touchscreen. I thought the "Windshield defogger switch" would turn on the windshield deicer automatically, but this morning that didn't appear to be the case. Need to test it again with frost in the morning. It could just be me, but the HVAC settings aren't that intuitive. I still appreciate all the buttons I can get and I'll figure it out eventually. Wish there was an easy button for all heat settings full blast and all cooling settings full blast.

Update on the de-icer: It works great but you have to access it thru the touchscreen.

 

[LC250CO]

I was thinking the same thing as the weather has only recently gotten cooler in my area. Next week the nights will be in the upper 20's and lower 30's so it will be interesting to see how it performs long term. Coming from a 5th gen 4Runner that blew hard with cold and hot this was a surprise. But, the couple of brief times I've used the heater in the LC so far, it does get quite warm and quickly. It almost seems more like it provides heat by convection rather than acting like a hair dryer in most other vehicles I've owned.

I didn't know about the deiver feature. My 4Runner had the wiper deicers which was nice so glad it's in there somewhere, although a physical button would be nice.

 

[LCQ]

For the blower speed, the dealer said it does seem to be a weird problem. Dealer talked with Toyota, and were advised to test a new LC arriving next week to see if it operates the same. They didn't seem to have any guesses on what could be causing it to be so weak, but you never know with the telephone game through service advisors.

Anyone on Mud willing to test theirs for me? Setting is highest fan speed, aimed at head, then set temp to "Lo" and note fan speed. Then switch it up to "Hi" temp and note fan speed.

For the de-icer, an alternative to turn on is "Hey Toyota, turn on de-icer." Or press the voice command button instead of "Hey Toyota."

 

[APIOQM]

Funny detail: Canadian market 1958 doesn’t have rear climate controls, so we get a deicer button instead.

 

[Atomic67]

Mine operates exactly how you describe. Very low air flow out front vents on heat. 2024 First Edition. FYI windshield de-icer can also be activated by "Hey Toyota Deicer" instead of hunting thru the menus. Seems to heat up fine but weird.

 

[LC250CO]

After a couple of weeks with a few cold nights, 20 degrees or lower, the heater seems to do its job during some of the short drives I have. S-Flow does not seem to not redirect airflow to where it's needed as efficiently as it probably should. But, the car does get warm, if not hot, even with the blower at around 80%. If I turn S-Flow off you can definitely notice a difference in overall airflow. Once off, I've also enabled the rear climate control and set it to sync and the cabin seems to get warmer even quicker. I like the idea of the S-Flow function and it seems to work better with the AC but it's still not perfect. Unfortunately, there's no way to keep it off. It seems remote starting the vehicle enabled it again and there are a couple of other instances where it enabled itself again, but haven't been able to figure out which conditions do it. For now, I don't see a reason to bring it into the dealership, mostly because I don't want them "trying" to figure it out. I'll wait to see if something more official comes of it.

 

[LCQ]

For the blower speed, the dealer said it does seem to be a weird problem. Dealer talked with Toyota, and were advised to test a new LC arriving next week to see if it operates the same. They didn't seem to have any guesses on what could be causing it to be so weak, but you never know with the telephone game through service advisors.

Anyone on Mud willing to test theirs for me? Setting is highest fan speed, aimed at head, then set temp to "Lo" and note fan speed. Then switch it up to "Hi" temp and note fan speed.

For the de-icer, an alternative to turn on is "Hey Toyota, turn on de-icer." Or press the voice command button instead of "Hey Toyota."

The dealer compared it to another one on the lot and said they both do the same thing. Still skeptical and will eventually test drive another one myself to confirm.

 

[Randy B]

With cooler weather on the way...

Is anyone noticing the fan speed blowing significantly lower in the highest manual heater setting (rather than cooling) when set to upper body/face airflow? I think I've tried everything but maybe I'm missing something. Drive mode is set to "Normal," fan blower setting in manual mode at highest notch, airflow set to upper body, heat temp set to HI, S-flow off (concentrated airflow mode), and "eco air conditioning" mode off. Additionally, I've toggled the following off/on and they seem to have no effect on the blower speed either way: Rear System on/off, Recirculate on/off, and A/C switch on/off.

It seems like the culprit might be the airflow mode "baffle" not going into the right position when on high heat manual & upper body airflow mode. When set to defrost, the fan speed seems a bit more powerful.

Another observation. My 1958 does not have a "Windshield de-icer switch" but it does let me turn it on thru the touchscreen. I thought the "Windshield defogger switch" would turn on the windshield deicer automatically, but this morning that didn't appear to be the case. Need to test it again with frost in the morning. It could just be me, but the HVAC settings aren't that intuitive. I still appreciate all the buttons I can get and I'll figure it out eventually. Wish there was an easy button for all heat settings full blast and all cooling settings full blast.

Update on the de-icer: It works great but you have to access it thru the touchscreen.

In heat mode, the blower doesn't flow like the ventilated mode to cool. The seat pads have heater strips in them and the more lights lit, means more resistance to the strips to make the heat more prominent. Parts 5 and 3. Depending on thick winter clothing and whether you have leather or simulated, could determine how quickly you feel the heat.

 

[HeadacheManNYC]

The heat is definitely a different animal in the 250 than any previous vehicle I've owned.
I haven't found it problematic, save for the mystery percolating sounds.
The seat heaters - and especially the steering wheel heater - on the other hand are just a tease. A suggestion of warmth at best.

 

[LCQ]

Here's a video of the issue I'm experiencing from my original post.

 

[stridertexas]

Here's a video of the issue I'm experiencing from my original post.

Mines doing the same thing. Take it off sync and put driver and passenger sides at different temps and it’ll blow hard. But when syncs on or driver and passenger temps are similar and towards heat, the fan blower drops off.

It’s so weird!

 

[LCQ]

Mines doing the same thing. Take it off sync and put driver and passenger sides at different temps and it’ll blow hard. But when syncs on or driver and passenger temps are similar and towards heat, the fan blower drops off.

It’s so weird!

How large of a gap did you need to see it work right? Like Hi on one side and Lo on the other? Sounds like Hi and 78 wouldn't be enough?

 

[stridertexas]

How large of a gap did you need to see it work right? Like Hi on one side and Lo on the other? Sounds like Hi and 78 wouldn't be enough?

2 days ago the outside temp was in the 30s. When I had sync off and both driver and passenger temps on LO, right when I turned the driver side temp up just a few degrees the blower speed plummeted.

Now today the outside temp is 62, and recreating the same thing, I can take the driver temp all the way up to HI with no real blower speed drop off.

Today at 62 outside, with Sync on, both driver and passenger starting at LO with full blower speed it drops off a lot at 72. 78+ the blower speed drops down to practically nothing.

It seems lime the hvac is definitely tied to the outside temp in some way. When it was in the 30s the blower speed dropped when the temp settings were only 67-68.

 

[Pauly]

Might be trying to avoid wind chill inside the vehicle? I know I prefer to not run the fan at high when it is still cold in the vehicle, even if the air coming out is warm, blowing it out fast into a cold vehicle may feel cold. Haven't experimented with mine. @stridertexas , was your experiment done after everything was warmed up, or shortly after starting the vehicle?

 

[stridertexas]

Might be trying to avoid wind chill inside the vehicle? I know I prefer to not run the fan at high when it is still cold in the vehicle, even if the air coming out is warm, blowing it out fast into a cold vehicle may feel cold. Haven't experimented with mine. @stridertexas , was your experiment done after everything was warmed up, or shortly after starting the vehicle?

When it was 62 outside everything was warmed up.

When it was 30ish outside, the vehicle had been sitting cold outside for several hours.

It’s the same result either way though.

 

[LCQ]

If my passenger side is set to Lo the fan speed will crank at the high output, regardless of the driver temp setting, like you mentioned @stridertexas. Setting a temp to Lo seems to be the only way to access full fan blower speed.

I'm still annoyed I can't manually control the fan speed to high by my own doing. I'm not a fan of auto temp settings. I like to crank the heat full blast manually when I want. Still can't get over the weak blower settings in the 250. It sounds like they're designed that way, which seems like an engineering oversight. Too bad Toyota engineers aren't reading these forums. There's some low hanging kaizen here.

 

[stridertexas]

Agreed. I think I'm going to cancel my service appt this week. Don't wanna leave it for 3 days just to be told again "that's how it works, nothing is wrong". The same as I was told with my seat heaters.

I wish the manual would just explain this so you'd know.

I am curious how the defrost works on the windshield with such little blower speed...it's too warm down here in Texas for me to ever get a chance to test it really.

 

[LCQ]

Defrost is about medium speed on mine. Maybe not the full high speed when on Lo, but stronger than when the diverter is set to head/upper body. It has cleared the windshield reasonably well.

 

[stridertexas]

Took my 250 in to dealer. My SA is a guy who’s more well versed with 4Rs and LCs, so we’ll see how much.

He said there’s a blending baffle that should not be cutting the fan blower speed out the vents as much as it is. Whatver the fan speed is for full blast A/C and temp on cold, when switching to heat it should be like 70% speed of that. That was his observation and guess.

Will report back once I hear something.

 

[LCQ]

My dealer compared it to another new one and said they function the same, after Toyota advised them to do so. Hopefully you get further. There are starting to be numerous complaints about it in another forum. Some of those threads are more about how you can’t manually control temperature (e.g it blows warm air when set to 62 degrees and will only blow cold air on Lo when in colder outside temps).

Air condition

Just picked up a 2025 LC, only hot air comes out of the vent even if I set it at 16 celsius , then I would turn on the A/C and set it still at 16 and still blowing out warm air. Cold air only starts coming out if I set the temp to LO and A/C on. Its the same over the last 3 days, is this...

www.landcruiserforum.com