[BandGap]

Weak heater?!!

Admittedly, yesterday evening was quite cold where I live, but nevertheless the rear windows iced up badly and no amount of fiddling with air handler settings was able to deal with it.
The blower air temperature just couldn’t get warm enough.

And I was the only occupant!

Never had this problem with other cars I’ve owned.

(Air source fresh, eco heat/cool off, rear window defroster always on, alternated between windshield defroster and cabin vents)

 

[ohw]

A couple thoughts: 1. what temperature did you set it all? 2. Have you try turning on the compressor (AC On) to help dry the air inside cabin?
I find the heater seems to be fine, not overly hot but OK. I have not tried making the car very warm either. But the air flow management to the back seat windows is not very good. My left side rear passenger window fogs up all the time where everything else is clear, same thing happens when I have 1/2/3/4 people in the car.

 

[Desy]

If it's on auto-temp yeah, it can seem underwhelming, but it is doing its job.

Seems to me, and this is all cars, that heat blown at a low speed, is more effective. Once the car warms up, leaving the speed on a low setting and max temp will work. My truck, a 91 s10 I don't even turn the fan speed off of one, and that's with just the floor vents going. In my Mini, I would have to turn the temps down after a little bit of driving because it'd roast you, also leaving the settings the same. The Corolla if anything, feels more comfortable but then again, I only use auto. I hate the higher speeds because I feel the air flow is to loud, as odd as that may sound.

 

[AstralWarrior]

Heh I just commented about this. Heater for the corolla is extremely weak... compared to my 2001 camry, its really weak

 

[BandGap]

Frustratingly, it has the weakest heater compared to that in any car previously owned by me (including several other Toyotas).

This was done, I’m sure, to save money.
The weak heater is a major fail if you live in an area which experiences quite cold winters.

I think Toyota cut far too many corners with this car (unlit cabin buttons, cheap tiny push buttons with small hard to read symbols , inadequate sound deadening...).

 

[steve108]

You can switch circulate on and it will get hotter, but then you might also have problems with the windows fogging up.

 

[Raithskar]

Frustratingly, it has the weakest heater compared to that in any car previously owned by me (including several other Toyotas).

This was done, I’m sure, to save money.
The weak heater is a major fail if you live in an area which experiences quite cold winters.

I think Toyota cut far too many corners with this car (unlit cabin buttons, cheap tiny push buttons with small hard to read symbols , inadequate sound deadening...).

That's so Toyota can claim a few improvements when they do the model refresh in 2022-2023 model year. ? Seriously, that's usually the best time to buy a new car - after at least one refresh cycle. I should have heeded my own advice, & not purchased a car in its first new-gen build cycle. ? Another reason why I will probably buy something else in a few years.

 

[takemorepills]

So, as engines become more thermally efficient (meaning they convert more of the combustion heat into motive energy) there will be less available waste heat to the heater system. The "Dynamic Force" engine in the Corolla is 40% thermally efficient: Toyota's new next-gen 2.0 engine is world's most thermally efficient
For comparison, the typical gas engine is about 20% thermally efficient. That means a 20% TE engine has much more waste heat generated, some of which makes the heater more effective.

BTW, using outside air in the cold (Canadia is pretty darn cold!) isn't a good idea in many cars. I'm pretty sure both of my other vehicles don't perform well in sub-freezing temps with FRESH air selected. Think about it, you are constantly trying to heat freezing air! With RECIRC you are re-heating air. Use RECIRC with A/C to keep the humidity in check. The A/C compressor runs just enough in these conditions (it's really too cold outside for the A/C compressor to come on much, you can check yourself, open the hood and watch the A/C compressor, it stays off most of the time in winter) to pull excess humidity out of the air without detracting much if any heat from the heater.

Man, can't believe some of ya'll went straight to conspiracy theory! Maybe the Russians did it?? !!

 

[killer23d]

What heater? ?‍♂ Only EV has heaters, ICE uses the engine for heat. Maybe block off the front grill and install a block heater would help?

 

[invader]

No problems at all here down to -30C this winter. I did try covering part of radiator last winter which was colder, but I found out I don't need it... Leave fan speed at lower setting when idling or driving at lower speeds to allow engine to warm up closer to normal operating temperature, especially when first started cold. Try to keep your floormat(s) clear of snow and water to reduce humidity.

 

[Hackenfort]

My SE has a fantastic heater

 

[invader]

What you call a heater is actually an engine... It certainly does provide sufficient heat, when given a chance.

 

[BandGap]

The engine does produce lots of heat but if certain components such as the heater core, blower, or ducts are undersized, for instance, the cabin heater system might struggle to keep windows clear in more extreme temperature/humidity conditions.


Previous cars I’ve owned never had their rear door glass ice up, with driver only in the car.