Plymouth Neon 1997

Tiny
EMORES
  • MEMBER
  • 1997 PLYMOUTH NEON
  • 4 CYL
  • 100,000 MILES
Engine surge when heater fan is on. I can hear a relay switch on and off.
Thursday, January 13th, 2011 AT 2:39 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
What I believe you are hearing is the ac compressor cycling. When you run the defroster, the AC runs to dehumidify the air entering the vehicle. Does it feel like in the summer when you run the AC only?
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Thursday, January 13th, 2011 AT 7:51 PM

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