Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Andy A on 29 May 2018, 20:46:16

Title: A/C and Rad fan question 2.2 petrol 2003
Post by: Andy A on 29 May 2018, 20:46:16

When I have the A/C on the A/C fan runs and when its off so is the fan.

On the radiator fan mine has always been on from from a cold start engine. Isn't it suppose to be off until the radiator gets hot enough to turn the switch on like most cars?

Title: Re: A/C and Rad fan question 2.2 petrol 2003
Post by: Nick W on 29 May 2018, 22:06:58

yes.


so your first job is to check that switch hasn't been bypassed. Then that the switch hasn't failed by checking it with a multimeter. If it has failed, then a new one is a quick, cheap easy fix.

Title: Re: A/C and Rad fan question 2.2 petrol 2003
Post by: Doctor Gollum on 29 May 2018, 22:49:44

Also bear in mind coolant and ambient temperatures ;)

Title: Re: A/C and Rad fan question 2.2 petrol 2003
Post by: Andy A on 30 May 2018, 09:53:00

Is it the top switch or the bottom one that controls the Rad fan?

Anyone got a part number or the correct temp that it turns on and off for the normal and high speeds?

Title: Re: A/C and Rad fan question 2.2 petrol 2003
Post by: steve6367 on 30 May 2018, 09:59:53

http://www.omegaowners.com/forum/index.php?topic=133825.0

Title: Re: A/C and Rad fan question 2.2 petrol 2003
Post by: Kevin Wood on 30 May 2018, 10:03:20

Both fans on the 2.2 run when the air conditioning is on. If anything is running with the air con off and a cold engine then it doesn't sound right.

You should have 2 coolant temperature switches - one with 3 pins and another with 2. The 2 pin one brings on both fans at slow speed (same as with air con running). The 3 pin switch brings on the engine fan at maximum speed. Depending on which symptom you have, you should be able to decide which switch is faulty (or pull the plug on them one at a time). :y

Title: Re: A/C and Rad fan question 2.2 petrol 2003
Post by: Andy A on 30 May 2018, 10:14:45

As soon as the weather drys up I'll go and investigate.

Thanks for all the info.  :y