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  #1  
Old April 2nd, 2018, 01:31
Interceptor429 Interceptor429 is offline
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clicking noise help ...on heat to a/c.

Ive tried searching but to no avail....my heater / ac is making a v licking noise when changed from heat to cool on the dail just as ut hits the blue line clicking starts.....sny thoughts or help im new to jeeps.. thanks in advance I have a 2001 60th anniversary edition graysilver. 201,000 odometer. Runs great heats great but ....clicking is stoppi g me from.checkinh a/c ....HELP PLEASE
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Old April 10th, 2018, 22:53
Interceptor429 Interceptor429 is offline
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Re: clicking noise help ...on heat to a/c.

Anyone could this be a blend door problem and how can I fix it myself ?
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Old April 11th, 2018, 19:44
JeepNoob JeepNoob is offline
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Re: clicking noise help ...on heat to a/c.

It's probably the blend door actuator. First stop will be to the parts store for a Chilton repair manual. Don't bother with Haynes manuals, they're junk. I've never had to do one on an XJ, but I don't remember them being that hard to get at.
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Old April 11th, 2018, 21:18
dktool dktool is offline
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Re: clicking noise help ...on heat to a/c.

The clicking you are hearing is likely the A/C clutch engaging then disengaging prematurely due to low refrigerant charge.

Open the hood, put it in "click" mode and watch / listen to the A/C clutch.

Normal operation is for it to engage and remain until the pressure reaches a low point prior to the evaporator beginning to freeze, then it disengages, the pressure and evap temp rise, the clutch engages again and the cycle repeats............
The A/C temp is regulated by a pressure switch and not through a thermostat or thermistor control.
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Old April 12th, 2018, 22:54
Interceptor429 Interceptor429 is offline
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Re: clicking noise help ...on heat to a/c.

Quote:
Originally Posted by JeepNoob View Post
It's probably the blend door actuator. First stop will be to the parts store for a Chilton repair manual. Don't bother with Haynes manuals, they're junk. I've never had to do one on an XJ, but I don't remember them being that hard to get at.
Thanks ill do that.
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