99 SR5 - Climate Control Problems

TRD 4RNR · 08-26-2003, 01:56 PM

SOMETIMES but not always, when it's hot outside, the AC doesn't cool, but I must stress, only sometimes. Other times it works really well.

SOMETIMES but not always, when it's cold outside, the Heater doesn't heat, but I must stress, only sometimes. Other times it works just fine.

I don't know anything about the Climate Control in my SR5 and wanted to know if anyone else has had something similar happen to them.

I hate to take it to the dealer and turn the truck over to them without some idea on what's going on ! !

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SLC Punk · 08-26-2003, 02:00 PM

You don't have the digital climate control, do you?

TRD 4RNR · 08-26-2003, 02:04 PM

Quote:

Originally posted by SLC Punk
You don't have the digital climate control, do you?

Nope

SLC Punk · 08-26-2003, 02:19 PM

Ok here is my Theory:

Usually when the heater blows cold air intermittently, it is because of air pockets in your cooling system. But since it happens on the Air Conditioner mode also, it can't be that. I think that your climate control system is electrical (whereas mine is mechanical), it could be that there is a short, or one of the contacts is either dirty or shorting out.

There is my $0.02

MTL_4runner · 08-26-2003, 02:30 PM

Quote:

Originally posted by SLC Punk
Ok here is my Theory:

I think that your climate control system is electrical (whereas mine is mechanical), it could be that there is a short, or one of the contacts is either dirty or shorting out.

There is my $0.02

Would certainly be the route I would take to diagnose it.
I think the twist knobs were when they went electrical.

Mine looks like this (with the mechanical slide actuators):
You can "feel" the ducts moving so you could easily tell if they were not closing/opening properly.

08-26-2003, 02:00 PM	#2 (permalink)
SLC Punk Contributing Member Join Date: Jul 2002 Location: SLC, UT Posts: 5,875	You don't have the digital climate control, do you? __________________ -Travis 1997 4Runner SR5 V6 4X4 Supercharged Desert Dune SOLD :( 1992 Celica All Trac (AWD-Turbo) #223 of 271 US spec for 1992 FOR SALE 2005 Tundra Double Cab Limited 4X4 2.5" lift 265/70R17 Dueler Revo's 4Runner and Celica Webpage

08-26-2003, 02:19 PM	#4 (permalink)
SLC Punk Contributing Member Join Date: Jul 2002 Location: SLC, UT Posts: 5,875	Ok here is my Theory: Usually when the heater blows cold air intermittently, it is because of air pockets in your cooling system. But since it happens on the Air Conditioner mode also, it can't be that. I think that your climate control system is electrical (whereas mine is mechanical), it could be that there is a short, or one of the contacts is either dirty or shorting out. There is my $0.02 __________________ -Travis 1997 4Runner SR5 V6 4X4 Supercharged Desert Dune SOLD :( 1992 Celica All Trac (AWD-Turbo) #223 of 271 US spec for 1992 FOR SALE 2005 Tundra Double Cab Limited 4X4 2.5" lift 265/70R17 Dueler Revo's 4Runner and Celica Webpage

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