1995 Mazda Protege my heater wont work

Tiny
GERMAN
  • MEMBER
  • 1995 MAZDA PROTEGE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 185,232 MILES
I just bought the car and the a/c blows normal air not cold like its supposed to and the heater blows the same as the a/c
Do you
have the same problem?
Yes
No
Saturday, October 10th, 2009 AT 8:18 PM

3 Replies

Tiny
BMRFIXIT
  • EXPERT
Check coolant level
Is the car reaching operating temp
Check heater core hoses if both are hot,
if both hoses hot and not enough heat inside suspect blend door actuator
if not one hose hot and the other warm or cold the heater core need to be flushed (very common)
as a 1st step
these are the steps
WARNING: NEVER REMOVE THE PRESSURE RELIEF CAP UNDER ANY CONDITIONS WHILE THE ENGINE IS OPERATING. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN DAMAGE TO THE COOLING SYSTEM OR ENGINE AND/OR PERSONAL INJURY. TO AVOID HAVING SCALDING HOT COOLANT OR STEAM BLOW OUT OF THE COOLING SYSTEM OR DEGAS BOTTLE, USE EXTREME CARE WHEN REMOVING THE PRESSURE RELIEF CAP FROM A HOT COOLING SYSTEM OR DEGAS BOTTLE. WAIT UNTIL THE ENGINE HAS COOLED, THEN WRAP A THICK CLOTH AROUND THE PRESSURE RELIEF CAP AND TURN IT SLOWLY UNTIL PRESSURE BEGINS TO RELEASE. STEP BACK WHILE THE PRESSURE IS RELEASED FROM THE COOLING SYSTEM. WHEN CERTAIN ALL PRESSURE HAS BEEN RELEASED, PRESS DOWN ON THE PRESSURE CAP (STILL WITH A CLOTH), TURN AND REMOVE PRESSURE RELIEF CAP.
Engine cool
lower the coolant level
Locate the two hoses running to the heater core
disconnect them at the engine side leaving hoses connected to heater core throw the firewall
use garden water hose and compressed air if possible
run the water and follow by air throw one side and out the other and vice versa
do that two to three times watching what leaving the heater core you are looking for the good flow and clear water to run throw
reconnect hoses
top off coolant system
good luck
let me know
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Saturday, October 10th, 2009 AT 8:21 PM
Tiny
RAINALLDAY
  • MEMBER
The 2 hoses are right at the firewall yes?
Wouldnt the car have to be elevated to reach these hoses? I ask because it seems darn near impossible to get to these hoses on my 1995 protege.
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Friday, January 8th, 2010 AT 1:50 PM
Tiny
BMRFIXIT
  • EXPERT
I would not disconnect the hoses from the firewall side and the heater core

but from the engine side leaving the hoses connected to the heater core
trying to remove them hoses from the heater core may cause damage to the heater core
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Friday, January 8th, 2010 AT 4:32 PM

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