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Discussion Starter #1
Hope this isn't too lame but in Canada heat is important. The cabin/defrost won't blow anything but cold air. I've ordered a thermostat but in the meantime I wondered if anyone had any other ideas. The engine temp. appears to be normal so even if the thermostat is stuck open, why don't I get any heat? I'm hoping it's not the climate control because that sounds alot more complicated. Thanks in advance because the forum is great!...........Mike
 

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I would presume that it has something to do with the heater-coil which can be a major headache to fix.

The heater-coil is the device that transfers heat from the engine cooling system to the interior climate control vents, it could possibly be a sign of a larger problem with the cooling system but don't be too alarmed. I'm not immidiately sure how the interior heating system in the Insight functions, so it may be set up differently than the average vehicle which I am familiar with.
 

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heater

Mike - has the car been serviced recently? The cooling system on these cars needs to be burped when the cooling system is serviced - it gets sort of an air lock. If a dealer has worked on it recently, it probably just needs to be burped. Is there anti freeze in the reservoir? How old is the car? How long have you had it? Do you know the car's history?
 

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Discussion Starter #5
the car is a 2001 & everything was working great last week. it hasn't had any recent service & the weather isn't any colder this week than last. i've had the car for a couple of months now but i have the service records for the car & it's just the normal stuff. it's just a matter of getting in it one morning & no heat. brrrr! there's supposed to be a thermostat at the dealers tonight so i'll post the outcome after it's replaced.
 

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Discussion Starter #6
well, i changed the thermostat today. before i started i noticed the following.
1. the diverter valve seemed to be working ok
2. both hoses to the heater seemed to be quite hot?
3. the big hose coming from the bottom of the rad to the thermostat was cold.
it's a beautiful day today. must be in the 70's so it's hard to judge but the hose from the rad to the thermostat is now very hot so i'm hoping the next time i try it on a cold morning it will be working. as an aside, the old thermostat sure looked good. just like new with absolutely no corrosion but since it's a thermal device i suppose it can fail anyway. thanks for the input, i hope it's solved.
 

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Discussion Starter #7
well, the thermostat did not fix the problem. there appears to be plenty of heat in all the hoses including both heater core hoses. however, the air coming out is barely above ambient. can anyone list all of the associated parts, especially the controls under the dash? is there a diverter flapper that may not be moving the air across the core?
 

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no heat

mbarr - there is a heater door. With the ignition on, engine off, you should be able to hear it when you turn the temp control dial up and down.
 

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Discussion Starter #9
if i look under the heater controls i see linkage on both the drivers side & passenger side. as i move the temp. control from cold to hot i see both sides moving from one extreme to the other. very frustrating as everything i've found that seems to be associated with the heater appears to be working. i hate taking it to the dealer as all work costs a gazillion dollars!
question: is there anything hiding behind the glovebox that could cause this?
 

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Discussion Starter #11
the car does have a/c. i'm about to give it up. everything i've checked appears to be working. i'm left with 2 theories.
1: even though the car has very low mileage & the cooling system appeared pristine when i changed the thermostat, the heater core has failed for some reason.
2: this is my first cool season owning the car so i don't have all the history. perhaps it was worked on. i know the a/c was worked on this summer right before i purchased the car. there is a heat control valve of some sort right before the hoses go through the firewall into the heater core. i'm left wondering if this valve was removed at some time & put in backwards? it has an arrow for flow direction but i don't know the correct position. the arrow points to the rear (towards firewall)?
 

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Try this: Hold down AUTO and MODE while turning on the key, and the A/C display flashes between two numbers. Press the rear window defogger (leftmost) button to advance to the next sensor.

The first number is the sensor:
1 = in car temp
2 = outside temp
3 = sun sensor
4 = engine coolant tmperature
5 = evaporator temp
6 = air mix opening %
7 = vent temp out
8 = something about the fan
9 = vehicle speed

For the temperature sensors the reading is in degrees C. If a sensor is disconnected or shorted, it displays "Er".

What do you get?

Also, do you know how to get error codes?
 

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Discussion Starter #13
interesting! 1-14....2-12.....3-00....4-32....5-14......6-F6....7-99....8-00....
9-00

i have a cdrom that tells me to turn ignition on & push auto then off then hold both together which i've tried but i just get the temp. setting.
 

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The 4-32 is saying that the coolant temperature is warm. Mine goes to 69 when I drive which seems low but everything works ok. If you did it after the car had cooled down for a while, I'd say the coolant temp is ok.

7-99 sounds bad. It sounds like the climate control system thinks the air coming out of the vent is at 210 degrees F.

Here's what the book says about getting codes from the climate control system. I haven't tried this.

1. Turn the ignition switch ON (II).
2. Press the AUTO button and then the OFF button. Continue to hold both buttons down.

If there is any abnormality in the system, the temperature indicator will light up the segment (A through N) corresponding to the error. The temperature indicator will then alternate between displaying "88" and the error code segment. If there is no abnormality, the segments will not light up.

What do you get?
 

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Discussion Starter #15
whenever i try the diagnostic thing it either stays off or on regularly. guess that means there aren't any codes. i thought the vent temp. was very high as well. i can't locate any info about this sensor so if anyone could point me to it?
 

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The codes only tell you if it's open or shorted. It might just be failed. The book tells how to test the sensor with icewater and hot water, or to try a known good unit.
 

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Discussion Starter #17
ok thanks. this has been very informative. now to find that sensor! Where is the little rascal, does anyone know?
 

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Discussion Starter #18
Well I had the car in to the local honda dealer today. It only cost me $300 to have them tell me it'll cost $1350.00 + taxes more to have it repaired! Can you believe that? Almost $2000 to have your heater fixed? Seems that everything in the car is working properly but the louver inside the heater box isn't opening for some reason. They didn't actually see it, just used the process of elimination. None of it is covered under the extended warrany & the louvers aren't offered as a part so you have to replace the entire heater unit assembly up to & including the core. Unbelievable. Honda will be hearing from me shortly.
 

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You should check that there is current to the actuator when operated. Or, maybe it is just jammed with some foreign debris like leaves. If you take it apart you can do these tests.
 

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Discussion Starter #20
all of the associated motors etc. are moving. i don't know how they could tell the little louver wasn't opening except for the lack of hot air. anyway, i talked to honda canada today & they're going to get back to me next week to tell me what if anything they can do for me.
 
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