Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: kingers on 10 January 2011, 22:34:31

Title: Heater only working on hottest?
Post by: kingers on 10 January 2011, 22:34:31

'98 2 litre petrol.

Heat only comes through when on max, anything below that is cold air - any thoughts on the problem?

Title: Re: Heater only working on hottest?
Post by: skyblue on 10 January 2011, 23:03:40

Have q look at maintance guide and see if the matric flush would help  sort the problem  :-/

Title: Re: Heater only working on hottest?
Post by: Boditza on 11 January 2011, 07:00:10

or the HBV(heater bypass valve) if the car has one.. we'll w8 for someone to confirm

Title: Re: Heater only working on hottest?
Post by: kingers on 11 January 2011, 21:23:35

Ya read the maintanence section before posting - no mention of this type of problem.

Title: Re: Heater only working on hottest?
Post by: kingers on 18 January 2011, 22:53:28

anybody got any suggestions?

Title: Re: Heater only working on hottest?
Post by: Jimbob on 19 January 2011, 09:18:46

When you say Max - is that Max Heat or Max Airflow or Both?

Have you flushed your heater matrix as suggested??  Always a good starting point for low heat.

And what is the temp of the car?  sitting at about midpoint on the guage?

Title: Re: Heater only working on hottest?
Post by: Neil_MV6 on 19 January 2011, 16:37:31

This happened to me when the outside air temp sensor had failed. New one acquired for a couple of quid off ebay and problem solved.

Title: Re: Heater only working on hottest?
Post by: kingers on 21 January 2011, 20:32:31

ah now that makes sense- the on board computer is reading huge temperatures.

Where is it located and is there anything I can do to fix it or do you have a link to where you bought yours?

I was referring to max temperature

Title: Re: Heater only working on hottest?
Post by: RobG on 21 January 2011, 20:35:53

Temp sensor lives under passenger side of front bumper, about £6-7 from VX

Title: Re: Heater only working on hottest?
Post by: kingers on 21 January 2011, 21:25:57

thanks - will take a look and see if the connections are ok first

Title: Re: Heater only working on hottest?
Post by: kingers on 22 January 2011, 15:25:25

trying find it - what does it look like?  is it inbetween the washer bottle and rad or lower down by the horns?

Title: Re: Heater only working on hottest?
Post by: Roger777 on 22 January 2011, 17:04:35

Hi just in front of nearside wheel on bott of bumper 14mm hole,but check 2 wires running back to harness,1 of mine had broke only thin wire ;) ;)

Title: Re: Heater only working on hottest?
Post by: kingers on 23 January 2011, 23:27:40

thanks roger - must oil change her during the week so will get it up on the ramp and a take a proper look

Title: Re: Heater only working on hottest?
Post by: kingers on 27 January 2011, 23:29:56

think i found it - dangling be the wires by the horns - is it a small black (like the size of a 50p coin) with a push in locator at one end and an electrical connector at the other end?

It was a bit corroded so we cleaned up the connectors which worked for a while but it was gone crazy again this evening - will probably just replace it.

Where does it locate into though - couldn't find a home for it...

Title: Re: Heater only working on hottest?
Post by: billy no mates on 29 January 2011, 13:50:37

Just experienced the same problem, heater is only blowing hot at Hi setting, the external temp. sensor not showing on dash. I have found a used sensor in the garage but.............

I cannot find the sensor on the car  :(, the only wiring in front of the passenger wheel at the horn are for the horn and fog lamps.

Have they relocated the sensor on the later model ?


FOUND IT......  on the later models it is in the middle of the bumper, below the washer bottle.

All working well.
 :) :)

Title: Re: Heater only working on hottest?
Post by: kingers on 02 February 2011, 22:31:14

Priced a new one today in the main dealer - 50 euro - what a joke dealers are in Ireland.