No hot air from the heater
10-04-2023, 03:38 PM
#1
2nd Gear
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No hot air from the heater
2000 Boxster 2.7 l
A/C works fine but the heater air will not get hot. The air gets warmer but not hot. There is hot water getting to and from the heater core. I've verified that all of the flaps are moving except the flesh air/recirculated air flap. Durametric says it's moving but I couldn't verify it visually. Per Durametric, all of the temperature sensors are reading proper temps except the “system outside temperature”. There is no signal for this parameter. I don't know what or where the “system outside temperature” sensor is. In my shop manual I find the "outside temperature sensor", an "interior temperature sensor" and a "footwell blower outlet temperature sensor". I've replaced the interior temperature sensor. Any ideas?
A/C works fine but the heater air will not get hot. The air gets warmer but not hot. There is hot water getting to and from the heater core. I've verified that all of the flaps are moving except the flesh air/recirculated air flap. Durametric says it's moving but I couldn't verify it visually. Per Durametric, all of the temperature sensors are reading proper temps except the “system outside temperature”. There is no signal for this parameter. I don't know what or where the “system outside temperature” sensor is. In my shop manual I find the "outside temperature sensor", an "interior temperature sensor" and a "footwell blower outlet temperature sensor". I've replaced the interior temperature sensor. Any ideas?
10-05-2023, 06:57 AM
#2
Heat, no heat
Hi. You'll find the external temperature sensor is mounted in one of the air intake grilles. It is a round the size of a standard cigarette in overall length. On UK cars it is on the right side grill & is a simple push fit into a moulded 'hoop'.
2000 Boxster 2.7 l
A/C works fine but the heater air will not get hot. The air gets warmer but not hot. There is hot water getting to and from the heater core. I've verified that all of the flaps are moving except the flesh air/recirculated air flap. Durametric says it's moving but I couldn't verify it visually. Per Durametric, all of the temperature sensors are reading proper temps except the “system outside temperature”. There is no signal for this parameter. I don't know what or where the “system outside temperature” sensor is. In my shop manual I find the "outside temperature sensor", an "interior temperature sensor" and a "footwell blower outlet temperature sensor". I've replaced the interior temperature sensor. Any ideas?
A/C works fine but the heater air will not get hot. The air gets warmer but not hot. There is hot water getting to and from the heater core. I've verified that all of the flaps are moving except the flesh air/recirculated air flap. Durametric says it's moving but I couldn't verify it visually. Per Durametric, all of the temperature sensors are reading proper temps except the “system outside temperature”. There is no signal for this parameter. I don't know what or where the “system outside temperature” sensor is. In my shop manual I find the "outside temperature sensor", an "interior temperature sensor" and a "footwell blower outlet temperature sensor". I've replaced the interior temperature sensor. Any ideas?
10-05-2023, 06:58 AM
#3
Heat, no heat
Hi. You'll find the external temperature sensor is mounted in one of the air intake grilles. It is a round the size of a standard cigarette in overall length. On UK cars it is on the right side grill & is a simple push fit into a moulded 'hoop'. In front bumper.
2000 Boxster 2.7 l
A/C works fine but the heater air will not get hot. The air gets warmer but not hot. There is hot water getting to and from the heater core. I've verified that all of the flaps are moving except the flesh air/recirculated air flap. Durametric says it's moving but I couldn't verify it visually. Per Durametric, all of the temperature sensors are reading proper temps except the “system outside temperature”. There is no signal for this parameter. I don't know what or where the “system outside temperature” sensor is. In my shop manual I find the "outside temperature sensor", an "interior temperature sensor" and a "footwell blower outlet temperature sensor". I've replaced the interior temperature sensor. Any ideas?
A/C works fine but the heater air will not get hot. The air gets warmer but not hot. There is hot water getting to and from the heater core. I've verified that all of the flaps are moving except the flesh air/recirculated air flap. Durametric says it's moving but I couldn't verify it visually. Per Durametric, all of the temperature sensors are reading proper temps except the “system outside temperature”. There is no signal for this parameter. I don't know what or where the “system outside temperature” sensor is. In my shop manual I find the "outside temperature sensor", an "interior temperature sensor" and a "footwell blower outlet temperature sensor". I've replaced the interior temperature sensor. Any ideas?
10-09-2023, 07:44 AM
#4
2000 Boxster 2.7 l
A/C works fine but the heater air will not get hot. The air gets warmer but not hot. There is hot water getting to and from the heater core. I've verified that all of the flaps are moving except the flesh air/recirculated air flap. Durametric says it's moving but I couldn't verify it visually. Per Durametric, all of the temperature sensors are reading proper temps except the “system outside temperature”. There is no signal for this parameter. I don't know what or where the “system outside temperature” sensor is. In my shop manual I find the "outside temperature sensor", an "interior temperature sensor" and a "footwell blower outlet temperature sensor". I've replaced the interior temperature sensor. Any ideas?
A/C works fine but the heater air will not get hot. The air gets warmer but not hot. There is hot water getting to and from the heater core. I've verified that all of the flaps are moving except the flesh air/recirculated air flap. Durametric says it's moving but I couldn't verify it visually. Per Durametric, all of the temperature sensors are reading proper temps except the “system outside temperature”. There is no signal for this parameter. I don't know what or where the “system outside temperature” sensor is. In my shop manual I find the "outside temperature sensor", an "interior temperature sensor" and a "footwell blower outlet temperature sensor". I've replaced the interior temperature sensor. Any ideas?
10-11-2023, 10:03 PM
#6
This thread, even though it is from the 987 forum will lead you to some good information. I just repaired my blend door/flaps. The hardest part was squeezing my arm and hands into the heater box and accessing the inside flap. If I had smaller hands it would have been much easier.
https://rennlist.com/forums/987-foru...l#post18890480
https://rennlist.com/forums/987-foru...l#post18890480
Last edited by dave_987; 10-11-2023 at 10:10 PM.