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: 8,539	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: 8,539	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



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.