Quote:
Originally Posted by Elbert
wierd issue...
Bought my K2500 Sub used...noticed that when A/C was on high fan / cold (without recirculation enabled) the the A/C blower fan would increase speed at random times.
Had the circuit board (reheostat) replaced...no change. Turn on A/C normal mode, fan high.. at times the fan will increase in speed purely at random...it does not maintain this speed, it will maybe have a dealy of 10 to 15 min where it slows back down, and then it runs faster for while.
Only guess now is that the fan motor potentially has an issue. Only applies to the front A/C, not to the rear. No issues noted with ALt output.
Anyone experienced this ?
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I still believe your problem is the blower motor ..upon removal you should be able to determine if it is in need of replacement...IT SHOULD ROTATE FREELY WITH NO DRAG...
Since you recently have had work done to this system It is very possible you have too much refrigerent in your system...I would check out the hi/low pressures to determine if this is so...
when the system is overcharged this reveals itself when the air temps rise ...If the system was charged during cool weather and the charge WT. was not carefully installed this can occur..