B9 Heating Issue?
01-17-2019, 04:55 AM
#11
AudiWorld Senior Member
Thread Starter
My B9 A4 is garaged so it doesn't experience the low temps of the night but I did leave it in a covered outdoor parking area while I was traveling for work and I was so impressed that it heated up completely in about 3 minutes. It had gotten down to around freezing and my car sat outside untouched for a couple of days, but heated right up when I returned. I even made a thread here because I was so impressed after having cars that you had to remote start 20 minutes in advance to get warmed up.
Even after coming back to it when leaving work and it sits in cold, it heats up very quickly. I have a 6 minute commute from my house in to work and it's warm at the half way point on my way home. The heated seats and wheel are almost instant it feels like, and the vents are blowing warm air after the third minute or so.
Definitely sounds like something is wrong with your car if it's taking 45 minutes to warm up.
Even after coming back to it when leaving work and it sits in cold, it heats up very quickly. I have a 6 minute commute from my house in to work and it's warm at the half way point on my way home. The heated seats and wheel are almost instant it feels like, and the vents are blowing warm air after the third minute or so.
Definitely sounds like something is wrong with your car if it's taking 45 minutes to warm up.
Our Q7 heats up that same way you describe that your A4 does, that's why when I started experiencing this it didn't make sense.
And sorry if I wasn't clear, but it actually warms up in approx 10 mins as long as I have the temp setting on "High". Even after the interior warms if I adjust the setting to anything besides "high" it blows cool air...
Interestingly, I only experience this on the first engine start of the day after the car has sat all night. Even yesterday after having the issue on my drive to work in the morning, got in the car 9 hours later to go home and the interior warmed up normally within 10 mins, and I was able to keep the temp setting in the 70's and received heat.
Last edited by JT4; 01-17-2019 at 05:00 AM.
01-17-2019, 05:00 AM
#12
AudiWorld Senior Member
Thread Starter
Almost sounds like what would happen if the thermostat was stuck in the open position.
My B9 also heats up the cabin very quickly in the coldest weather. I set mine to Auto and 74 degrees and pretty much forget about it. My coolant temperature gauge gets to normal quickly too.
My B9 also heats up the cabin very quickly in the coldest weather. I set mine to Auto and 74 degrees and pretty much forget about it. My coolant temperature gauge gets to normal quickly too.
Check your coolant circulation pumps. They are located just behind and below the coolant reservoir.
Has your coolant level dropped recently?
I had my coolant level drop and then began having coolant pump problems stemming from a leaking thermostat housing and water pump, (both of those are located on the block just below the throttle body which is below spark plug 3.) This leaking coolant was draining down the wiring and was interrupting the run signal to the circulation pumps. One of the pumps circulating coolant to the heater core in the cabin and the other moves coolant through the transmission cooler.
here is the link to my ordeal
https://www.audiworld.com/forums/a4-...-open-2963618/
Has your coolant level dropped recently?
I had my coolant level drop and then began having coolant pump problems stemming from a leaking thermostat housing and water pump, (both of those are located on the block just below the throttle body which is below spark plug 3.) This leaking coolant was draining down the wiring and was interrupting the run signal to the circulation pumps. One of the pumps circulating coolant to the heater core in the cabin and the other moves coolant through the transmission cooler.
here is the link to my ordeal
https://www.audiworld.com/forums/a4-...-open-2963618/
Thanks for all of the responses and ideas everyone.. It's under warranty so I am bringing it in on Sat and plan to leave it for several days..Let's see what they say...
01-17-2019, 05:06 AM
#13
AudiWorld Super User
01-17-2019, 06:43 AM
#14
AudiWorld Member
This morning I paid closer attention to how my car warms up. When I started out this AM is was 36 degrees (F) here, and after I pulled out of the garage into the driveway, I let the car idle for about a minute while I fiddled with my phone before I started driving.
I started driving the side streets at about 25 mph for about a minute and then out of a major road where I drove for less than a minute at 35 mph before I had to stop at a light. While I was waiting at the light, my Audi dash clock showed four minutes time elapsed since I initially hit the start button. At four minutes the car had reached its normal coolant temperature reading (for my car its four bars) and the fan blower (set at Auto/74 degrees) was blowing warm air into the cabin at high speed.
I started driving the side streets at about 25 mph for about a minute and then out of a major road where I drove for less than a minute at 35 mph before I had to stop at a light. While I was waiting at the light, my Audi dash clock showed four minutes time elapsed since I initially hit the start button. At four minutes the car had reached its normal coolant temperature reading (for my car its four bars) and the fan blower (set at Auto/74 degrees) was blowing warm air into the cabin at high speed.
Last edited by Dave W; 01-17-2019 at 09:59 AM.
01-17-2019, 07:23 AM
#15
AudiWorld Senior Member
Thread Starter
I had a similar experience yesterday afternoon / evening on my way home from work. Started the car, reset my short term trip computer, put my phone in the mount and drove away in approx 2 mins. On parkway timer showed 8 mins elapsed and vents were blowing warm air at 75 degrees... This morning back to the same 45 mins of temp setting on "High" to get heat..
01-17-2019, 12:57 PM
#16
AudiWorld Member
I have a '17 A4 and an '18 Q5 and about a 2 mile drive to a train station every morning. The drive takes about 6 minutes, and unless it's below 10 degrees (F) both cars are blowing decent hot air by the time I get there. I'm happy with that.
01-17-2019, 04:41 PM
#18
01-17-2019, 05:02 PM
#19
AudiWorld Senior Member
01-17-2019, 07:50 PM
#20