Not blowing any hot air from vents - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Alfrz · 11-09-2023, 01:11 AM

Has always blown hot air super fast, now won't get hot whether it's on recirculate or not, where should I start?

Ultramaroon · 11-09-2023, 02:39 AM

The engine.

RZNT4R · 11-09-2023, 05:57 AM

- Does air get hotter towards the passenger side vents?
- If you turn the car on with no engine and the fan at low speed, can you hear the temperature door swing in the vents if you cange the temperature from one extreme to the other?
- If it's already hot, touch the heater hoses, are they hot or cold? On hot/one cold? Both hot? both cold?
- Wait until it's cool. Open the radiator cap. Coolant level? - IF low, check for leaks.

humfrz · 11-16-2023, 12:11 AM

Quote:

Originally Posted by Ultramaroon

The engine.

humfrz · 11-20-2023, 01:09 AM

Is it blowing any air at all or is it just not hot?

Bubba says to cover half of the radiator with cardboard -

(hell, it worked back in the fifties)

cmiovino · 11-20-2023, 10:58 AM

A good start is to check the coolant system to see if you ran the overflow tank dry and picked up any air into the system. If it's empty or really low, it's a good indication the system needs refilled and burped.

Ultramaroon · 11-20-2023, 12:03 PM

Come on, @Alfrz, we see that you're logging in. What's the scoop?

x808drifter · 11-20-2023, 01:04 PM

Quote:

Originally Posted by Ultramaroon

Come on, @Alfrz, we see that you're logging in. What's the scoop?

The "I'm a dipshit and won't admit it." syndrome?
IE: Something super simple like it wasn't even set to hot.
Or the coolant suggestion.

Ultramaroon · 11-20-2023, 02:27 PM

Quote:

Originally Posted by x808drifter

The "I'm a dipshit and won't admit it." syndrome?
IE: Something super simple like it wasn't even set to hot.
Or the coolant suggestion.

I figured it was another drive-by thread, but whatevs. ChatGPT doesn't extend olive branches.

Alfrz · 01-27-2024, 03:31 PM

Quote:

Originally Posted by Ultramaroon

Come on, @Alfrz, we see that you're logging in. What's the scoop?

Lol sorry, no clue. It did it once since then, towards the end of a drive the air went cold. Never got any codes or anything

All my controls were in the right positions, trust me I sat in that car for 10minutes trying to figure it out that first night, so honestly wish I had more info for y'all. It just didn't become a problem and I didn't realize this thread was being posted on lol

B T · 01-27-2024, 06:38 PM

Quote:

Originally Posted by Alfrz

Lol sorry, no clue. It did it once since then, towards the end of a drive the air went cold. Never got any codes or anything

All my controls were in the right positions, trust me I sat in that car for 10minutes trying to figure it out that first night, so honestly wish I had more info for y'all. It just didn't become a problem and I didn't realize this thread was being posted on lol

As they suggested above, check your coolant levels. If you're low enough it wont make it to the heater core and will cause additional issues such as overheating. Hopefully its just a little low and didn't burn off through the head gasket.

motrek · 02-10-2024, 01:24 PM

Quote:

Originally Posted by Alfrz

Has always blown hot air super fast, now won't get hot whether it's on recirculate or not, where should I start?

How's your engine temp?

I had an old car where the thermostat broke and the coolant always cycled through the radiator, so the engine never warmed up and thus the heater didn't work.

Alfrz · 03-12-2024, 08:38 PM

To update this, I never did end up checking my coolant since the issue went away and never came back...
Until yesterday it didn't work again.
This morning I got a CEL light and traction turned off, P0128 and P0125. Coolant was probably almost bone try because it took a little over a gallon straight to the radiator. Car wouldn't turn over til codes were cleared, back in action now

Ultramaroon · 03-12-2024, 10:09 PM

Dear God, man! Was your temp gauge not pegged?

11-09-2023, 01:11 AM	#1
Alfrz Member Join Date: Apr 2016 Drives: 13 Scion Frs Location: Denver Posts: 34 Thanks: 7 Thanked 12 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Not blowing any hot air from vents Has always blown hot air super fast, now won't get hot whether it's on recirculate or not, where should I start?

11-09-2023, 02:39 AM	#2
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,870 Thanks: 52,132 Thanked 36,520 Times in 18,921 Posts Mentioned: 1107 Post(s) Tagged: 9 Thread(s)	The engine. __________________ service manuals

11-20-2023, 10:58 AM	#6
cmiovino Senior Member Join Date: Aug 2020 Drives: 2017 BRZ PP, 2004 WRX Location: Pittsburgh Posts: 347 Thanks: 16 Thanked 249 Times in 157 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	A good start is to check the coolant system to see if you ran the overflow tank dry and picked up any air into the system. If it's empty or really low, it's a good indication the system needs refilled and burped. __________________ 2017 BRZ Limited Performance Pack - Steel Cities Region SCCA / North Hills Sports Car Club

11-20-2023, 12:03 PM	#7
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,870 Thanks: 52,132 Thanked 36,520 Times in 18,921 Posts Mentioned: 1107 Post(s) Tagged: 9 Thread(s)	Come on, @Alfrz, we see that you're logging in. What's the scoop? __________________ service manuals

03-12-2024, 10:09 PM	#14
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,870 Thanks: 52,132 Thanked 36,520 Times in 18,921 Posts Mentioned: 1107 Post(s) Tagged: 9 Thread(s)	Dear God, man! Was your temp gauge not pegged? __________________ service manuals

11-09-2023, 05:57 AM	#3
RZNT4R Professional Mechanic Join Date: Apr 2010 Drives: 2017 86 6MT Oceanic Location: Quebec, Canada Posts: 789 Thanks: 17 Thanked 633 Times in 371 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	- Does air get hotter towards the passenger side vents? - If you turn the car on with no engine and the fan at low speed, can you hear the temperature door swing in the vents if you cange the temperature from one extreme to the other? - If it's already hot, touch the heater hoses, are they hot or cold? On hot/one cold? Both hot? both cold? - Wait until it's cool. Open the radiator cap. Coolant level? - IF low, check for leaks.

11-20-2023, 01:09 AM	#5
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 29,869 Thanks: 28,791 Thanked 31,816 Times in 16,425 Posts Mentioned: 708 Post(s) Tagged: 2 Thread(s)	Is it blowing any air at all or is it just not hot? Bubba says to cover half of the radiator with cardboard - (hell, it worked back in the fifties)

03-12-2024, 08:38 PM	#13
Alfrz Member Join Date: Apr 2016 Drives: 13 Scion Frs Location: Denver Posts: 34 Thanks: 7 Thanked 12 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	To update this, I never did end up checking my coolant since the issue went away and never came back... Until yesterday it didn't work again. This morning I got a CEL light and traction turned off, P0128 and P0125. Coolant was probably almost bone try because it took a little over a gallon straight to the radiator. Car wouldn't turn over til codes were cleared, back in action now

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