Mike Romain

I will agree that the place you went are thieves! They should be
exposed to the local news media.

None of the things mentioned have much bearing on 'no heat' only. If
any were bad, you would have a 'no engine running' situation with
coolant blowing all over the place.

I also would start with the fluid shut off valve to verify it is
working. It is just before the firewall on one heater hose and defaults
to off if it has no vacuum to the switch. Or the lever just rots away
sometimes....

Also note that if the coolant is low in the radiator itself, the heater
lines will airlock really easily so you get no inside heat.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Nightcheck wrote:
> Hi -
>
> My son has a 1994 Jeep Cherokee and the heater has stopped blowing
> warm air. The A/C works fine; however, when he switches it to "heat" -
> only cool air comes out.
>
> There doesn't appear to be any leak in the Heater Core - Since I'm
> not sure if any fuses control the heater - I checked all of them since
> I couldn't find a schematic or diagram listing what each fuse is for -
> but all the fuses are fine.
>
> He took it to a dealer for an estimate - they quickly said it was
> probably the water pump, hoses, T-Stat and would cost about $700.
>
> I know next to nothing about auto repairs except what i have
> experienced in the cars I have owned over the years - but it strikes
> me as odd that we never saw any water or any other liquid leaking
> which perplexes me a bit if they said the water pump was leaking - and
> I also don't understand the connection between the water pump and
> heater. Since the A/C works fine - and the heater blows air - just
> cool and not warm/hot - It's a bit confusing for me.
>
> Does it sound reasonable what the dealership claims is the problem -
> if so, does their quote seem reasonable? - and if it isn't a "leaky"
> water pump - any ideas on that the problem could be?
>
> Thanks so much in advance and will rely on your input to determine
> if he should take it back to the dealer for the new water pump -
> or ????
>
> Rick
>

Mike Romain

I will agree that the place you went are thieves! They should be
exposed to the local news media.

None of the things mentioned have much bearing on 'no heat' only. If
any were bad, you would have a 'no engine running' situation with
coolant blowing all over the place.

I also would start with the fluid shut off valve to verify it is
working. It is just before the firewall on one heater hose and defaults
to off if it has no vacuum to the switch. Or the lever just rots away
sometimes....

Also note that if the coolant is low in the radiator itself, the heater
lines will airlock really easily so you get no inside heat.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Nightcheck wrote:
> Hi -
>
> My son has a 1994 Jeep Cherokee and the heater has stopped blowing
> warm air. The A/C works fine; however, when he switches it to "heat" -
> only cool air comes out.
>
> There doesn't appear to be any leak in the Heater Core - Since I'm
> not sure if any fuses control the heater - I checked all of them since
> I couldn't find a schematic or diagram listing what each fuse is for -
> but all the fuses are fine.
>
> He took it to a dealer for an estimate - they quickly said it was
> probably the water pump, hoses, T-Stat and would cost about $700.
>
> I know next to nothing about auto repairs except what i have
> experienced in the cars I have owned over the years - but it strikes
> me as odd that we never saw any water or any other liquid leaking
> which perplexes me a bit if they said the water pump was leaking - and
> I also don't understand the connection between the water pump and
> heater. Since the A/C works fine - and the heater blows air - just
> cool and not warm/hot - It's a bit confusing for me.
>
> Does it sound reasonable what the dealership claims is the problem -
> if so, does their quote seem reasonable? - and if it isn't a "leaky"
> water pump - any ideas on that the problem could be?
>
> Thanks so much in advance and will rely on your input to determine
> if he should take it back to the dealer for the new water pump -
> or ????
>
> Rick
>

Mike Romain

I will agree that the place you went are thieves! They should be
exposed to the local news media.

None of the things mentioned have much bearing on 'no heat' only. If
any were bad, you would have a 'no engine running' situation with
coolant blowing all over the place.

I also would start with the fluid shut off valve to verify it is
working. It is just before the firewall on one heater hose and defaults
to off if it has no vacuum to the switch. Or the lever just rots away
sometimes....

Also note that if the coolant is low in the radiator itself, the heater
lines will airlock really easily so you get no inside heat.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Nightcheck wrote:
> Hi -
>
> My son has a 1994 Jeep Cherokee and the heater has stopped blowing
> warm air. The A/C works fine; however, when he switches it to "heat" -
> only cool air comes out.
>
> There doesn't appear to be any leak in the Heater Core - Since I'm
> not sure if any fuses control the heater - I checked all of them since
> I couldn't find a schematic or diagram listing what each fuse is for -
> but all the fuses are fine.
>
> He took it to a dealer for an estimate - they quickly said it was
> probably the water pump, hoses, T-Stat and would cost about $700.
>
> I know next to nothing about auto repairs except what i have
> experienced in the cars I have owned over the years - but it strikes
> me as odd that we never saw any water or any other liquid leaking
> which perplexes me a bit if they said the water pump was leaking - and
> I also don't understand the connection between the water pump and
> heater. Since the A/C works fine - and the heater blows air - just
> cool and not warm/hot - It's a bit confusing for me.
>
> Does it sound reasonable what the dealership claims is the problem -
> if so, does their quote seem reasonable? - and if it isn't a "leaky"
> water pump - any ideas on that the problem could be?
>
> Thanks so much in advance and will rely on your input to determine
> if he should take it back to the dealer for the new water pump -
> or ????
>
> Rick
>