Omega Owners Forum

Omega Help Area => Omega Electrical and Audio Help => Topic started by: 05omegav6 on 10 November 2014, 11:03:31

Title: Heater blower stopped working...
Post by: 05omegav6 on 10 November 2014, 11:03:31
Discovered that the heater fan has stopped working in the Desmond  :'( Was fine on Tuesday/Wednesday but dead yesterday/still...

Climate panel produces all the right noises, and heater gets warm, is just that the fan has stopped working :-\

Guessing that the hedgehog has died as the fan does nothing... spins freely by hand and fuses all intact, I would also expect the resistor to get hot if there's any current running through it :-\

That said where's the relay that feeds the hedgehog? Assuming of course that there is one :-\

Just debating whether I really need to pull the glove box to access it.
Title: Re: Heater blower stopped working...
Post by: Kevin Wood on 10 November 2014, 12:05:53
There's no relay as such. IIRC, it's fed from one of the maxi fuses in the cabin fusebox, so might be worth checking those.

Before pulling the motor, might be worth disconnecting it from the hedgehog and applying 12V to it, just to confirm the motor is OK.
Title: Re: Heater blower stopped working...
Post by: 05omegav6 on 10 November 2014, 16:21:49
Fuse is fine, so looks like the glovebox is coming out :-\

Presumably the fan will only see 12v if the climate panel is set to full speed? If the resistor works...
Title: Re: Heater blower stopped working...
Post by: TheBoy on 10 November 2014, 17:23:27
Fuse is fine, so looks like the glovebox is coming out :-\

Presumably the fan will only see 12v if the climate panel is set to full speed? If the resistor works...
Not even sure if it works at full chat if hedgehog blown, as its effectively an electronic speed controller with sold state drives (never looked if FET or bipolar).


Worth unplugging fan and shoving 12v on it to prove fan is OK, they do occasionally fail (without seizing)
Title: Re: Heater blower stopped working...
Post by: 05omegav6 on 10 November 2014, 17:49:11
The fan was quiet, no squeaks or rattles. Certainly no sign of imminent demise :-\

Job for Wednesday  :y
Title: Re: Heater blower stopped working...
Post by: TheBoy on 10 November 2014, 18:03:55
The fan was quiet, no squeaks or rattles. Certainly no sign of imminent demise :-\
Means eff all.

But be prepared to change the hedgehog...
Title: Re: Heater blower stopped working...
Post by: dbug on 10 November 2014, 23:31:06
As everyone else has said, put 12v across blower motor first to check.  I've seen quiet working blower motors pack up just like that!  Had two blower faults on Omegas - one was dead motor, other was dead hedgehog.
Title: Re: Heater blower stopped working...
Post by: chrisgixer on 11 November 2014, 00:18:05
When we said the blower motor was very quiet the other day....


...it was actually working, wasn't it?
Title: Re: Heater blower stopped working...
Post by: 05omegav6 on 11 November 2014, 03:00:31
When we said the blower motor was very quiet the other day....


...it was actually working, wasn't it?
It was then ;D only noticed because there was a bit of condensation after popping to the shops...
Title: Re: Heater blower stopped working...
Post by: chrisgixer on 11 November 2014, 03:18:52
...mines playing up. Cc doing randome things. Fan speed jumping up and down, temp not responding/giving heat and cold at the same time.

I have the glove box and associated gubbins out, but I don't see how that affects things.

I reset it before getting out of the car tonight. See how it is tomorrow. :(
Title: Re: Heater blower stopped working...
Post by: 05omegav6 on 19 November 2014, 17:04:10
Have scientifically eliminated the motor as the culprit, leaving only the hedgehog...

Any way to test it? Or do I simply assume that it's toast and get a new one? :-\
Title: Re: Heater blower stopped working...
Post by: RobG on 19 November 2014, 17:43:34
Have scientifically eliminated the motor as the culprit, leaving only the hedgehog...

Any way to test it? Or do I simply assume that it's toast and get a new one? :-\
Only way I know of is to disconnect both large connectors from speed controller, bridge them, if fan runs controller is donald
Title: Re: Heater blower stopped working...
Post by: 05omegav6 on 19 November 2014, 18:04:48
Have scientifically eliminated the motor as the culprit, leaving only the hedgehog...

Any way to test it? Or do I simply assume that it's toast and get a new one? :-\
Only way I know of is to disconnect both large connectors from speed controller, bridge them, if fan runs controller is donald
Is that the block that all the fan wiring passes through on the way to the resistor :-\
Title: Re: Heater blower stopped working...
Post by: RobG on 19 November 2014, 18:28:38
This connector block at the controller. The two large spade connectors need to be bridged
(http://i190.photobucket.com/albums/z257/belisensis/OMEGAFORUM/fanspeedcontrollerhedgehog.jpg) (http://s190.photobucket.com/user/belisensis/media/OMEGAFORUM/fanspeedcontrollerhedgehog.jpg.html)
Title: Re: Heater blower stopped working...
Post by: 05omegav6 on 19 November 2014, 19:52:36
Gotcha :y
Title: Re: Heater blower stopped working...
Post by: omega squared on 09 December 2014, 11:32:24
I've got this on my problem Omega, changed the hedgehog and still no fan.
How easy is it to put power direct to the blower to test?
Title: Re: Heater blower stopped working...
Post by: 05omegav6 on 09 December 2014, 12:03:09
Six feet of twin core wire with spade connectors on one end straight to the battery :y
Title: Re: Heater blower stopped working...
Post by: Kevin Wood on 09 December 2014, 14:01:53
Six feet of twin core wire with spade connectors on one end straight to the battery :y

As a bodge, that's almost Tunnie-esque!

Oh, you meant just to test it. ;)
Title: Re: Heater blower stopped working...
Post by: 05omegav6 on 09 December 2014, 17:26:48
Six feet of twin core wire with spade connectors on one end straight to the battery :y

As a bodge, that's almost Tunnie-esque!

Oh, you meant just to test it. ;)
;D I know my wiring isn't great, but give me some credit... ::) As a permanent fix I would probably add a switch and a fuse...