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Hey,Sounds like your heater core but first try to blow out the heater core,disconnect the 2 hoses going thru the firewall and get a hose and run it thru one end and it should come out the other end or it's clogged.Here's a link on how to replace.Need more help,let me know.
For heater core replacing procedure. I suggest you to go through
this related help links.Its all complete step by step procedure: ----How to replace heater core for All car models?
very expensive, i believe the far thinking swedes put it on the driver side behind the cluster, steering, and pedals, even on their export model. my cousin found it cheaper to buy a new car than to spend more than the value of her 97 volvo to have its heater core replaced.
Remove the front dash panel by turning the lower screws in a
counter-clockwise direction, then unscrewing the single bolt on the lip
of the instrument cluster and pulling the panel out. Remove the rear
wiper switch and the 4x4 switches, if applicable. Lowering the tilt
wheel will allow the panel to be totally removed.
Remove the radio, headlight switch module and glove box by turning their screws in a counter-clockwise direction.
Remove the main dashboard by unbolting it at the front, between the
windshield and firewall. There are six to eight bolts holding it in,
and, once they are removed, the dash can be pulled away from the
firewall. Be careful not to pull too much, as the wiring harness could
become damaged.
Drain the coolant system by turning the drain plug on the lower left
corner of the radiator and allowing the fluid to fall into the drain
pan. Uncapping the radiator can reduce the internal pressure.
Remove the heater core hose, on the upper left of the engine bay by pinching their hose clamps with a pair of pliers and pulling them
off. Some models will have screw-type hose clamps; turning them
counter-clockwise will loosen them. Age and heat may have stuck the
hoses to the core nipples, and the hoses can be cut right at these
nipples if necessary. Leave enough hose to reconnect the new core.
Unbolt the heater core's mounts with a socket wrench in a
counter-clockwise direction. Once the bolts are free, the heater core
can be maneuvered toward the windshield and slid out. Some coolant may
splash out, so have a towel handy.
Replace the heater core with a new one by sliding it into place and securing the mounting bolts.
Reconnect the heater core's hoses, turn the radiator's drain plug
clockwise to close it, then refill the coolant system with a 50/50
percent mix of coolant and water.
Reconnect the dashboard to the firewall, then replace the front dash
panel and fasten its instrument cluster screw and bottom bolts.
Crank up the Jimmy and add coolant until the heater core is filled and blowing hot air.
Replace the radiator cap.
Good luck and make sure you have lots of time and use the camera on your cell phone and take pictures to use as reference.
Remove the front dash panel by turning the lower screws in a
counter-clockwise direction, then unscrewing the single bolt on the lip
of the instrument cluster and pulling the panel out. Remove the rear
wiper switch and the 4x4 switches, if applicable. Lowering the tilt
wheel will allow the panel to be totally removed.
Remove the radio, headlight switch module and glove box by turning their screws in a counter-clockwise direction.
Remove the main dashboard by unbolting it at the front, between the
windshield and firewall. There are six to eight bolts holding it in,
and, once they are removed, the dash can be pulled away from the
firewall. Be careful not to pull too much, as the wiring harness could
become damaged.
Drain the coolant system by turning the drain plug on the lower left
corner of the radiator and allowing the fluid to fall into the drain
pan. Uncapping the radiator can reduce the internal pressure.
Remove the heater core hose, on the upper left of the engine bay by pinching their hose clamps with a pair of pliers and pulling them
off. Some models will have screw-type hose clamps; turning them
counter-clockwise will loosen them. Age and heat may have stuck the
hoses to the core nipples, and the hoses can be cut right at these
nipples if necessary. Leave enough hose to reconnect the new core.
Unbolt the heater core's mounts with a socket wrench in a
counter-clockwise direction. Once the bolts are free, the heater core
can be maneuvered toward the windshield and slid out. Some coolant may
splash out, so have a towel handy.
Replace the heater core with a new one by sliding it into place and securing the mounting bolts.
Reconnect the heater core's hoses, turn the radiator's drain plug
clockwise to close it, then refill the coolant system with a 50/50
percent mix of coolant and water.
Reconnect the dashboard to the firewall, then replace the front dash
panel and fasten its instrument cluster screw and bottom bolts.
Crank up the Jimmy and add coolant until the heater core is filled and blowing hot air.
Replace the radiator cap.
Good luck and make sure you have lots of time and use the camera on your phone and take pictures to use as reference.
not an easy job - steering column needs to drop down - bolts under dash - bolt on each side above hood release and glove box behind kick pads - top of dash should have 4 screws going towards windshield - with glove box - radio - temp control -gauge cluster out - any other brackets and bolts should be seen - heater core box will have to come out as unit - freon lines to be disconnected - a/c system will have press. in lines
Removal & Installation
1.Disconnect negative battery cable. Drain cooling system. Disconnect
heater hoses from heater core, and plug openings. Detach hood release
cable. Remove both dash side panels. Remove left and right lower dash
trim panels. Remove glove box. Remove 7 screws securing center
accessory console. Disconnect wires on accessory console, and remove
accessory console. Remove control cables at heater case.
2.Remove 4 bolts securing steering column to instrument panel. Lower
steering column. Remove 2 bolts from instrument panel mounts at far
left and right sides of instrument panel. Remove defroster duct trim on
top of dash. Remove instrument cluster screws. Pull instrument cluster
out slightly. Disconnect electrical connections and speedometer cable
from instrument cluster. Remove instrument cluster.
3.Disconnect all electrical connectors from instrument panel. Remove
parking brake console. Remove glove box. Remove bolts securing
instrument panel support to floorpan. Remove all instrument panel
mounting bolts. Remove instrument panel.
4.Separate heater case from blower. Remove 3 nuts and pull heater
Start by draining the coolant, disconnect dash board wiring harness from pcm behind kick panels, disconnect eye shaft, unbolt dashboard and remove dash. (Remember to tape steering wheel in place as it might have a clock spring). You might have to remove some trim panel on top of dash or cluster from dashboard to gain access to retaing bolts, disconnect heater hoses from heater core in engine compartment and remove heater core, reverse install.
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