Clicking noise when heat is on

[Upstate Ex]

If I'm stopped, like at a drive thru window or stop sign, and the heat is on, I hear a clicking noise coming from underneath the truck. It's not a continuous noise but in regular intervals of 20 seconds or so. Is this normal? Anyone else experience this?

 

[SplashMan]

I have the same noise, I opened the hood and it seemed to be coming from the t-stat. I think it is the t-stat opening and closing...

 

[Arnold D.]

Are you sure its not your AC compressor cycling?

 

[KillerXLT]

I have the same prob. I was told by a ford tech where I work what SplashMan said, and does it on almost every EX he has worked on.

 

[ToneDog]

Re: Clicking

If You check out your manual it says that the A/C compressor is activated when selector knob is turned to every position EXCEPT the floor poosition regardless if you have your other selector on heat or cold (red/blue)

This is normal

Hope I could help!

ToneDog