Is the issue there when using heat and air-con?
If so, then check the blower motor and fan switch for fault.
Check any cabin air filter if fitted for clogging.
If only an issue with hot air flow, then check the heater matrix hasn't bunged up.
If only a cold air flow, then check the air conditioning car evaporator in the cabin for signs of clogging.
Clogging can be more of an issue in pet owner's cars as pet hair readily clogs up these two components in cars fitted with no interior air cleaner element/filter.
SOURCE: Front air condition does not blow cold. Rear air condition does
sounds like a damper door in the front not working properly, these are actuated by the front temp control, the door is operated by either a manual cable, and electric actuator, or vacuum. I hope this helps you zero in on your problem. Merry Christmas
SOURCE: 2001 chevy blazer replaced fuel pump, wants to
hi its rob was it running befor u replaced the pump if its petrol take out the spark plugs maken sure not to mess up the timeing give them a clean .if its deizil prime the system o open the injectors
SOURCE: where are the air conditioning fuses 97 chevy blazer located
97 only had one fuse panel in the dash on the drivers side. There is/was a junction block for power that had/has fusible links on the driver side fender too.
a) 20a pwr accy
b) 30a pwr wdo
1) 20a stop/haz
2) 20a horn/dm
3) 20a tl/ctsy
4) 20a guages
5) 20a Eng-1
6) 25a htr/ac
7)25a pwr aux
8) 30a rr defog
9) 20a ecm/batt
10) 20a emc/ign
11) 20a radio
12) not used
13) 10a rdo/batt
14) 10a illum
15) 10a drl
16) 15a turn/back up
17) 25a wiper
18) 20a brake
19) 20a 4wd
20) 10a crank
21) 20a fog
22) 10a air bag
23) 10a trans
24) 10a prndl
The A/C relay is in the glove box behind a panel that indicate relay. There are three relays in there, the middle relay is the fuel pump and one of the out side relay is for the A/C compressor and the other is for the third brake light. Just can not remember which out side relay is the A/C so just swap the out side relays with one another. Good luck and hope this helps. Keep me posted.
SOURCE: secondary air injection pump location
under the radiator on the passenger side of the truck. There is a little splash guard you will need to remove to see it, The guard is held in with 4 15mm headed bolts, then you will be able to see the bottom of the air pump.
SOURCE: How to replace a heat/ac blower motor in a 2001 blazer
it is under dash ,behind glove box,not a hard job at all
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