does A/C need a relay? ignition switch HOT to touch - The 1947 - Present Chevrolet & GMC Truck Message Board Network

AnobleL74 · 05-18-2017, 09:26 PM

When i run my A/C (classic Air) the terminal on back of my Ignition switch get very hot to touch.
I notice my a/c switch get power from what appears to be a heavy gauge wire from the fuse box.
Do A/C units need a separate Relay kit?
thanks
Allan

**Clyde65** · 05-18-2017, 09:45 PM

Most aftermarket ac systems do have a relay. I have an Old Aitlr Products system and it has one. I also do everything I can to avoid pumping modern accessories through my trucks switches or fuse block. Headlights are an example.

Good luck!

AnobleL74 · 05-19-2017, 10:12 AM

Quote:

Originally Posted by Clyde65

Most aftermarket ac systems do have a relay. I have an Old Aitlr Products system and it has one. I also do everything I can to avoid pumping modern accessories through my trucks switches or fuse block. Headlights are an example.

Good luck!

thanks i will see about getting a relay

AnobleL74 · 05-20-2017, 09:06 AM

I added a painless relay kit to my radiator coolant fan, this seems to have fixed my problem.
Will keep an eye on it, may add a A/C blower relay kit later, i think i can use the same painless coolant fan kit

AnobleL74 · 05-22-2017, 10:11 PM

Quote:

Originally Posted by AnobleL74

I added a painless relay kit to my radiator coolant fan, this seems to have fixed my problem.
Will keep an eye on it, may add a A/C blower relay kit later, i think i can use the same painless coolant fan kit

added the relay for my A/C today , ignition switch now cool to touch. i think this is going to take care of the problem.

**Clyde65** · 05-22-2017, 10:18 PM

Outstanding!

AnobleL74 · 05-30-2017, 10:14 AM

Quote:

Originally Posted by AnobleL74

I added a painless relay kit to my radiator coolant fan, this seems to have fixed my problem.
Will keep an eye on it, may add a A/C blower relay kit later, i think i can use the same painless coolant fan kit

added thermostat switch to radiator fan, love this , much better than 100% on

luvbowties · 05-31-2017, 10:47 PM

IMO, we guys would be smart to keep a 'few' relays lying around. Standard in their build and wiring, buying a few at one time is a cheap investment, and before you know it, you are out of them and need to order more. I like to get caught up into sensible habits that we don't ever have to 'break'.
sam

**The Rocknrod** · 06-01-2017, 09:00 AM

Quote:

Originally Posted by luvbowties

... a cheap investment, ...sensible habits ...

Hasnt been a good match with my car/truck hobby.

05-18-2017, 09:26 PM	#1
AnobleL74 Registered User Join Date: Jan 2017 Location: orlando florida Posts: 113	does A/C need a relay? ignition switch HOT to touch When i run my A/C (classic Air) the terminal on back of my Ignition switch get very hot to touch. I notice my a/c switch get power from what appears to be a heavy gauge wire from the fuse box. Do A/C units need a separate Relay kit? thanks Allan

05-18-2017, 09:45 PM	#2
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,545	Re: does A/C need a relay? ignition switch HOT to touch Most aftermarket ac systems do have a relay. I have an Old Aitlr Products system and it has one. I also do everything I can to avoid pumping modern accessories through my trucks switches or fuse block. Headlights are an example. Good luck! __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

05-20-2017, 09:06 AM	#4
AnobleL74 Registered User Join Date: Jan 2017 Location: orlando florida Posts: 113	Re: does A/C need a relay? ignition switch HOT to touch I added a painless relay kit to my radiator coolant fan, this seems to have fixed my problem. Will keep an eye on it, may add a A/C blower relay kit later, i think i can use the same painless coolant fan kit

05-22-2017, 10:18 PM	#6
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,545	Re: does A/C need a relay? ignition switch HOT to touch Outstanding! __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

05-31-2017, 10:47 PM	#8
luvbowties Registered User Join Date: Feb 2009 Location: southeasternfoothillsofusa Posts: 1,557	Re: does A/C need a relay? ignition switch HOT to touch IMO, we guys would be smart to keep a 'few' relays lying around. Standard in their build and wiring, buying a few at one time is a cheap investment, and before you know it, you are out of them and need to order more. I like to get caught up into sensible habits that we don't ever have to 'break'. sam

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