help

Roadroach · 01-24-2018, 09:57 AM

Fan motor works fine. I can direct the air wherever it needs to go. Temps on the gauge read completely normal - just no heat out of any of the vents no matter where the air is directed.

'06 3.0si daily driver. The heat has been working fine with no problems until yesterday.

Any clues about what to check first?

3798j · 01-24-2018, 11:09 AM

This might be worth a look. The fix was replacing the "heater core sensor". The video is about an E46. Read the text that accompanies it (he explains how after replacing stuff under the hood, it didn't restore heat in the cabin). Then go to about 27:25...it's where he starts the part about the sensor....its replacement...and success. Hope I'm not leading you astray.

Roadroach · 01-24-2018, 01:34 PM

Thanks Jay - that video was helpful. Gives me a decent idea of what components to test and where they're located.

elerner61 · 01-25-2018, 09:35 AM

I did some research for you yesterday as well. When I poked around the RealOEM diagrams looking for a Heater Control Valve (routes hot coolant to the heater core to control temperature)...I couldn't find one. Reading a variety of other posts, I'm getting the feeling that there isn't one for E85/E86 heater systems. I've got a feeling the heater core always has water running through it and temperature is controlled via a servo actuated door that controls air flow.

Take a look at these RealOem diagrams (links below) . What do folks think? If this is the case, I think your troubleshooting is as follows:

1. Confirm that hot coolant is making its way to the heater core by feeling the hoses heading from the block, through the firewall. There is also small electric pump that is part of that flow (part number 64118369806).

2. If the hose to the heater core is hot, then you'll have to strip some dash pieces to get to the heater core. Confirm that the heater core is getting hot and then visually troubleshoot and see what controls how hot water/air is routed.

3. If there truly is a heat/air "blend door" and that doesn't seem to be moving to route air through the heater core the try to manually move that door to get heat. If that fixes it, then you may have a faulty "Acuator Drive Air Mixture Flap, part number 64116936709"

Let us know what comes of this adventure please.

http://www.realoem.com/bmw/enUS/show...diagId=64_1524

http://www.realoem.com/bmw/enUS/show...diagId=64_1281

3798j · 01-25-2018, 10:52 AM

I wasn't sure if E85/86's had a sensor, so before I posted that video, I went to rockauto.com to see if there was such an animal and found one (it is listed as a "cabin air temperature sender").

https://screenshots.firefox.com/zRqN...w.rockauto.com

Roadroach · 01-25-2018, 11:05 AM

Thanks Elerner - I was looking over those same diagrams last night at realoem and was starting to come to the same conclusion (no "heater control valve" per se).

I did find the temperature sensor itself per Jay's video (part number 64226915391) but now I'm not sure of an "easy" way to test it since the video mentions disconnecting the electrical connector from the heater control valve to determine if the sensor was the culprit.

Here's the kicker though - no heat at all yesterday - but everything was functioning just fine and dandy this morning. So.......now I get to track down an intermittent gremlin.

joy.

I'll mess with it this weekend and see if I can reach any conclusions. I will say this - the heater in my '66 is somewhat simpler.

3798j · 01-25-2018, 11:12 AM

Quote:

Originally Posted by Roadroach

I will say this - the heater in my '66 is somewhat simpler.

Had to smile when I read this Roadroach...I enjoy the old car hobby also...with one from the 1950's and three from the 1960's. You're so right.

Roadroach · 01-25-2018, 11:29 AM

Quote:

Originally Posted by 3798j

Had to smile when I read this Roadroach...I enjoy the old car hobby also...with one from the 1950's and three from the 1960's. You're so right.

I've barely got time for one project let alone 4. And my one hasn't even been on the road for a few years (car is currently apart for a "refresh" that is on the way back-burner). One of these days though.....

I checked the part number on that sensor you posted. I think that's actually the ambient air sensor that fits up in the wheel well and not the HVAC sensor.

3798j · 01-25-2018, 11:55 AM

Quote:

Originally Posted by Roadroach

I checked the part number on that sensor you posted. I think that's actually the ambient air sensor that fits up in the wheel well and not the HVAC sensor.

I saw that too. But because they also listed it under "cabin air temp sensor", I thought that there are two with this one in the interior where it's used to control the temp when in the "auto" mode.

Back in high school, a buddy got a one year old '66 white with blue interior, 289 2bl 210 HP 3 spd manual fastback. That car was surprisingly quick. Hopefully yours will be back on the road soon.

Roadroach · 01-25-2018, 12:37 PM

Quote:

Originally Posted by 3798j

Back in high school, a buddy got a one year old '66 white with blue interior, 289 2bl 210 HP 3 spd manual fastback. That car was surprisingly quick. Hopefully yours will be back on the road soon.

Fun little cars. Mine's dark ivy green with an ivy gold and white pony interior. When I got it, it had the 225hp 4bl 289 and the 3sp C4 automatic. And on open 3.00:1 rear-end. Did some awesome 1-wheel burnouts.

It's been somewhat molested since then.

4:10 trac-loc 9" rear end, Mustang SVO rear disk, 5 speed T5 manual (with a freaking tall 0.68 overdrive), 302 mexican block, small chamber 289 heads with larger chevy valves, performer rpm intake and a 650cfm holley. Relocated front a-arms (per the '65 GT350's), koni shocks, boss 302 front springs (cut 1 coil) and reverse-eye rear leafs. panhard bar. Period correct torq-thrust D's. Can't remember what else.

Other than being lowered a bit and the rims, the car looks stock.

3798j · 01-25-2018, 02:13 PM

^Nice choice of modifications...particularly the suspension...it gives the Mustang a great stance (particularly sitting on Torque-Thrusts). Similarly, I run a 302 (out of a '68 Galaxie) with a performer intake and Holley 4160 in a 1955 Ford F100...wonderful motor.

Roadroach · 01-25-2018, 03:37 PM

Sweet F100 man. Luv that red. Heck of a stablemate to a z4c.

elerner61 · 01-26-2018, 09:36 AM

I haven't had an 8 cylinder car in my life for ....way too long. Definitely a need at this point and not a want. What to tell the wife....

Phoo-yuck, intermittent problem. Sorry to hear. I've got to think that sensor is for "auto" mode. Take some pictures while you're in there too!.

01-24-2018, 09:57 AM	#1
Roadroach First Lieutenant 165 Rep 305 Posts Drives: 2006 Z4 3.0si coupe w/stick Join Date: Jan 2015 Location: Austin, Texas iTrader: (0)	help - no heat Fan motor works fine. I can direct the air wherever it needs to go. Temps on the gauge read completely normal - just no heat out of any of the vents no matter where the air is directed. '06 3.0si daily driver. The heat has been working fine with no problems until yesterday. Any clues about what to check first? __________________ 2006 Z4 coupe - with HOMELINK! 1966 Mustang GT fastback (too many mods to list) 2015 335i GT 2014 981 Cayman S manual
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01-24-2018, 11:09 AM	#2
3798j Lieutenant Colonel 11412 Rep 1,794 Posts Drives: E86 3.0si Join Date: Oct 2011 Location: Susquehanna Valley iTrader: (0) Garage List '55 Ford F100 [0.00] '08 Z4 3.0SI [8.50] '66 Triumph TR4A [0.00] '85 Corvette [0.00] '64 Corvette [0.00] '68 Triumph GT6 [0.00] '19 VW Golf "R ... [0.00]	This might be worth a look. The fix was replacing the "heater core sensor". The video is about an E46. Read the text that accompanies it (he explains how after replacing stuff under the hood, it didn't restore heat in the cabin). Then go to about 27:25...it's where he starts the part about the sensor....its replacement...and success. Hope I'm not leading you astray.
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01-24-2018, 01:34 PM	#3
Roadroach First Lieutenant 165 Rep 305 Posts Drives: 2006 Z4 3.0si coupe w/stick Join Date: Jan 2015 Location: Austin, Texas iTrader: (0)	Thanks Jay - that video was helpful. Gives me a decent idea of what components to test and where they're located. __________________ 2006 Z4 coupe - with HOMELINK! 1966 Mustang GT fastback (too many mods to list) 2015 335i GT 2014 981 Cayman S manual
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01-25-2018, 09:35 AM	#4
elerner61 Major 157 Rep 1,107 Posts Drives: '07 Z4M Roadster Join Date: May 2011 Location: Mount Kisco, NY iTrader: (0)	I did some research for you yesterday as well. When I poked around the RealOEM diagrams looking for a Heater Control Valve (routes hot coolant to the heater core to control temperature)...I couldn't find one. Reading a variety of other posts, I'm getting the feeling that there isn't one for E85/E86 heater systems. I've got a feeling the heater core always has water running through it and temperature is controlled via a servo actuated door that controls air flow. Take a look at these RealOem diagrams (links below) . What do folks think? If this is the case, I think your troubleshooting is as follows: 1. Confirm that hot coolant is making its way to the heater core by feeling the hoses heading from the block, through the firewall. There is also small electric pump that is part of that flow (part number 64118369806). 2. If the hose to the heater core is hot, then you'll have to strip some dash pieces to get to the heater core. Confirm that the heater core is getting hot and then visually troubleshoot and see what controls how hot water/air is routed. 3. If there truly is a heat/air "blend door" and that doesn't seem to be moving to route air through the heater core the try to manually move that door to get heat. If that fixes it, then you may have a faulty "Acuator Drive Air Mixture Flap, part number 64116936709" Let us know what comes of this adventure please. http://www.realoem.com/bmw/enUS/show...diagId=64_1524 http://www.realoem.com/bmw/enUS/show...diagId=64_1281
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01-25-2018, 10:52 AM	#5
3798j Lieutenant Colonel 11412 Rep 1,794 Posts Drives: E86 3.0si Join Date: Oct 2011 Location: Susquehanna Valley iTrader: (0) Garage List '55 Ford F100 [0.00] '08 Z4 3.0SI [8.50] '66 Triumph TR4A [0.00] '85 Corvette [0.00] '64 Corvette [0.00] '68 Triumph GT6 [0.00] '19 VW Golf "R ... [0.00]	I wasn't sure if E85/86's had a sensor, so before I posted that video, I went to rockauto.com to see if there was such an animal and found one (it is listed as a "cabin air temperature sender"). https://screenshots.firefox.com/zRqN...w.rockauto.com Last edited by 3798j; 01-25-2018 at 11:20 AM..
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01-25-2018, 11:05 AM	#6
Roadroach First Lieutenant 165 Rep 305 Posts Drives: 2006 Z4 3.0si coupe w/stick Join Date: Jan 2015 Location: Austin, Texas iTrader: (0)	Thanks Elerner - I was looking over those same diagrams last night at realoem and was starting to come to the same conclusion (no "heater control valve" per se). I did find the temperature sensor itself per Jay's video (part number 64226915391) but now I'm not sure of an "easy" way to test it since the video mentions disconnecting the electrical connector from the heater control valve to determine if the sensor was the culprit. Here's the kicker though - no heat at all yesterday - but everything was functioning just fine and dandy this morning. So.......now I get to track down an intermittent gremlin. joy. I'll mess with it this weekend and see if I can reach any conclusions. I will say this - the heater in my '66 is somewhat simpler. __________________ 2006 Z4 coupe - with HOMELINK! 1966 Mustang GT fastback (too many mods to list) 2015 335i GT 2014 981 Cayman S manual
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01-25-2018, 02:13 PM	#11
3798j Lieutenant Colonel 11412 Rep 1,794 Posts Drives: E86 3.0si Join Date: Oct 2011 Location: Susquehanna Valley iTrader: (0) Garage List '55 Ford F100 [0.00] '08 Z4 3.0SI [8.50] '66 Triumph TR4A [0.00] '85 Corvette [0.00] '64 Corvette [0.00] '68 Triumph GT6 [0.00] '19 VW Golf "R ... [0.00]	^Nice choice of modifications...particularly the suspension...it gives the Mustang a great stance (particularly sitting on Torque-Thrusts). Similarly, I run a 302 (out of a '68 Galaxie) with a performer intake and Holley 4160 in a 1955 Ford F100...wonderful motor.
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01-25-2018, 03:37 PM	#12
Roadroach First Lieutenant 165 Rep 305 Posts Drives: 2006 Z4 3.0si coupe w/stick Join Date: Jan 2015 Location: Austin, Texas iTrader: (0)	Sweet F100 man. Luv that red. Heck of a stablemate to a z4c. __________________ 2006 Z4 coupe - with HOMELINK! 1966 Mustang GT fastback (too many mods to list) 2015 335i GT 2014 981 Cayman S manual
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01-26-2018, 09:36 AM	#13
elerner61 Major 157 Rep 1,107 Posts Drives: '07 Z4M Roadster Join Date: May 2011 Location: Mount Kisco, NY iTrader: (0)	I haven't had an 8 cylinder car in my life for ....way too long. Definitely a need at this point and not a want. What to tell the wife.... Phoo-yuck, intermittent problem. Sorry to hear. I've got to think that sensor is for "auto" mode. Take some pictures while you're in there too!.
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