Odd noise when HEVACon

TT Tim · 14th March 2018, 10:31

Hi All,

Odd one for you.

I spent most of last weekend, much to the annoyance of my wife, trying to fix the air-lock in my cooling system, I'm pleased to say this is now done, with new PRT fitted, and I even pulled the heater matrix and flushed it, what a PITA rejoining those pipes is!

Now however I have an odd noise, it's as if having the HEVAC on amplifies the engine noise, when it's turned off its nice and silent, but on it gives off a noise that rises and falls with revs.

Any ideas? It's not a big issue, just an annoying one.

Thanks

Tim

suzublu · 14th March 2018, 10:41

You sure it's not the fan

Steve1966 · 14th March 2018, 11:07

My aircon was noisy until I got it re-gassed. When on its like a rumble, maybe from the compressor?, but it's now quiet since the re-gas.

COLVERT · 14th March 2018, 14:19

Excuse me. What's HEVAC ????---------------

Steve1966 · 14th March 2018, 14:33

HEating, Ventilation, and AirCon??

slovcan · 14th March 2018, 19:26

Quote:

Originally Posted by Steve1966

HEating, Ventilation, and AirCon??

Different terms in different locations, maybe? Over here we call it HVAC.

14th March 2018, 10:31	#1
TT Tim Regular poster Rover 75 Tourer Join Date: Feb 2018 Location: Brook, Ashford, Kent Posts: 61 Thanks: 18 Thanked 40 Times in 6 Posts	Odd noise when HEVACon Hi All, Odd one for you. I spent most of last weekend, much to the annoyance of my wife, trying to fix the air-lock in my cooling system, I'm pleased to say this is now done, with new PRT fitted, and I even pulled the heater matrix and flushed it, what a PITA rejoining those pipes is! Now however I have an odd noise, it's as if having the HEVAC on amplifies the engine noise, when it's turned off its nice and silent, but on it gives off a noise that rises and falls with revs. Any ideas? It's not a big issue, just an annoying one. Thanks Tim

14th March 2018, 11:07	#3
Steve1966 Loves to post 2000 W Rover 75 Saloon 1.8 Man Club (SE) Join Date: Mar 2012 Location: Warwickshire Posts: 436 Thanks: 66 Thanked 95 Times in 48 Posts	My aircon was noisy until I got it re-gassed. When on its like a rumble, maybe from the compressor?, but it's now quiet since the re-gas. __________________ Jobs Done since (Apr 2012): Spyhole, Thermostat, IMG (x2), Front ARB Drop links (x3 pairs), Rear Damper, Coils/HT Leads, Heater Matrix, Unions, 13x tyres, Gearbox Oil, Full Service (x3), Water pump & belts, LH/RH lower arm & bushes, Front/Rear pads/Discs, Fr door finishers, Track Rods, Jule's intake tube, Clutch, Slave, DMF (ouch), 1 1/2 exhausts, front springs/top mounts, Jule's Fan upgrade/condenser, reverse gear switch, OSR upper arm, spring, and sill welding. 78,000miles (175,600m total).

14th March 2018, 14:33	#5
Steve1966 Loves to post 2000 W Rover 75 Saloon 1.8 Man Club (SE) Join Date: Mar 2012 Location: Warwickshire Posts: 436 Thanks: 66 Thanked 95 Times in 48 Posts	HEating, Ventilation, and AirCon?? __________________ Jobs Done since (Apr 2012): Spyhole, Thermostat, IMG (x2), Front ARB Drop links (x3 pairs), Rear Damper, Coils/HT Leads, Heater Matrix, Unions, 13x tyres, Gearbox Oil, Full Service (x3), Water pump & belts, LH/RH lower arm & bushes, Front/Rear pads/Discs, Fr door finishers, Track Rods, Jule's intake tube, Clutch, Slave, DMF (ouch), 1 1/2 exhausts, front springs/top mounts, Jule's Fan upgrade/condenser, reverse gear switch, OSR upper arm, spring, and sill welding. 78,000miles (175,600m total).

14th March 2018, 10:41	#2
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,922 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	You sure it's not the fan

14th March 2018, 14:19	#4
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	Excuse me. What's HEVAC ????---------------