A/C Blower Fan - ZR-1 Net Registry Forums

mgbrv8 · 06-18-2013

Im researching on how to get more performance out of my Blower fan so I can get more vent pressure. now while investigating I found that the red wire on the blower resistor got very very hot (depicted in the picture). Is this normal or is this a sign of a relay going out? I cleaned the motor and fan and oiled the motor also and still no improvement. Is there a upgrade I seem to remember someone installing a suburban blower motor once but I cant find anything about it.

Dave

WVZR-1 · 06-18-2013

Quote:

Originally Posted by mgbrv8

Im researching on how to get more performance out of my Blower fan so I can get more vent pressure. now while investigating I found that the red wire on the blower resistor got very very hot (depicted in the picture). Is this normal or is this a sign of a relay going out? I cleaned the motor and fan and oiled the motor also and still no improvement. Is there a upgrade I seem to remember someone installing a suburban blower motor once but I cant find anything about it.

Dave

Generally speaking blower performance from a C4 blower isn't an issue, the pitch and number of blades accomplish that. Your reference to a different motor I believe could be a C3 related issue where later motors were used BUT a change of the fan/squirrel cage and a ground correction would accomplish the same. I would check the quality of the ground to the motor maybe even do a separate ground. Blower speed is governed by resistance. Your connection seems to indicate substantial resistance. Hi-blow is a 12V direct function.

If the valves/doors are functioning correctly in the blower/ac box and distribution assembly it's a blower motor performance issue. Put 12V and a ground only to the motor. What now?

Check for leaks at the evaporator housing and even trash in the evaporator fins. There is a filter on the face of the evaporator. #7 this image is a filter:

Evap Housing.png

GOLDCYLON · 06-18-2013

Id try replacing the blower fan if its never been seen too before. I had a blower issue on mine I could bang the outside of the suitcase housing and the pitch would increase. The blower fan is a $50 and 1 hr job to fix. Keep in mind that little motor and the squirrel cage have been running for over 20 years. It might just need a refresh to return to normal performance. Also while you are there clean the quirrel cage and vacuum out the suitcase free of dirt, leaves etc. GC

06-18-2013	#3
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: A/C Blower Fan Id try replacing the blower fan if its never been seen too before. I had a blower issue on mine I could bang the outside of the suitcase housing and the pitch would increase. The blower fan is a $50 and 1 hr job to fix. Keep in mind that little motor and the squirrel cage have been running for over 20 years. It might just need a refresh to return to normal performance. Also while you are there clean the quirrel cage and vacuum out the suitcase free of dirt, leaves etc. GC __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 06-18-2013 at 12:20 PM.