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Got a question. I notice that when I turn on the heater either cool or hot, not the A/C...it does not seem to come out quite as forcefully as it should. No noise coming from the blower, in fact it works well. My question is...could something be blocking the air flow?
Since the heater pulls air from the cowl the core can get blocked with debris. I think you can remove the inlet side of the housing from under the hood without having to access anything under the dash.
Sic friatur crustulum
'84 GW with Nissan SD33T, early Chev NV4500, 300, narrowed Ford reverse 44, narrowed Ford 60, SOA/reversed shackle in fornt, lowered mount/flipped shackle in rear.
AC is a different fan from heat and defrost. The AC has a blower in the AC housing under the dash, and the heater blower is in the heater box under the hood. I'd expect the heater to be quieter than the AC, because of its location. True, the cowl vent is known for getting plugged with debris. This is especially bad at the floor vents, which tend to get packed full of stuff.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.
WOW!!! Ill have to check that out and see!! Holy crow....I think to avoid any further clogging, I was thinking of JB Welding, or better yet maybe velcro some metal screen under the vents where the wipers are...any thoughts?
Home Depot sells a fiberglass screen door mesh that you can put under the cowl vent cover. I cut mine to fit and let the cover screws keep it in place. I've been amazed at how much stuff it has stopped. Tons of leaves.
1977 Cherokee Chief - The Blair Jeep Project III
A collection of parts flying in close formation
Do the motors go up and down in speed when you turn the knob ?
If not the relay on the firewall needs cleaning.. Mine would only blow one speed.. cleaned thst big relay on firewall in the engine bay and it worked so much better after.
1998 Jeep Grand Cherokee 5.9L Limited 219k
1998 Jeep Grand Cherokee 4.0 I6 laredo 430k
1990 Jeep Grand Wagoneer 155k
1976 Jeep J10.. 85k(repaired)
candymancan wrote:Do the motors go up and down in speed when you turn the knob ?
If not the relay on the firewall needs cleaning.. Mine would only blow one speed.. cleaned thst big relay on firewall in the engine bay and it worked so much better after.
Yes they do. I am sure its leaves and such blocking the vents.