I have used the GROM-BT3 unit for years, with the HU-613. It's great for playing podcasts. The mic audio doesn't seem to be great for phone calls, so I use iPhone ear buds for that, unless it's just a conference call where I don't need to say anything. I really wish the steering wheel buttons could ...

The same thing started happening for me today while driving my 2001 V70 2.4T (the fan went to full regardless of setting). I pulled the fuse since it didn't stop after I turned off the engine. I want to get the part ordered so I can stop pulling the fuse. Can anyone confirm that the module is called...

Yes! Heat is back and strong like I remember it used to be! It took a long time to decide to change the core since it wasn’t obviously bad, but clearly it didn’t have the same heat transfer properties as the OEM one. Here are photos for comparison. Note the different size and number of tubes, visibl...

I replaced the core today. I put some additions to others' notes in the post at https://www.matthewsvolvosite.com/forums/viewtopic.php?f=9&t=84522 I think the core was the problem. it flowed great but had poor heat transfer. Once I finally got it out, I compared it to the Behr core that I had bo...

I replaced my heater core in my 2001 V70 2.4T today. Velorider's tips were great. Here are a few more to add: 1. The trick of vacuuming the coolant out of the lines to the core is awesome!! Worked great, I don't think there was even a drip inside. (Though my floor mat has already been soaked with co...

OK, I learned some more things today but the heater is no better. I took out the thermomstat and it works perfectly. Doesn't budge until it nears 195F, then opens up wide. It's Volvo and Wahlers branded made in Germany. For now at least I put that one back in. Then I took the hoses to the heater cor...

@Georgeandkira, happy anniversary and thanks for the thoughts. @cn90, thanks also. I'm starting to favor the thermostat theory because I took a long drive with the family today, and evenually it got too warm and I was able to dial the setting back to 72. When I turned it on full, the air actually go...

I have been assuming not the thermostat since the temperature gauge acts like it should: goes up to the middle in 10-15 minutes and stays there. Also temperature at the thermostat outlet was 190F. Thanks though.

(I moved this here since I put it in a "solved" topic the first time.) Got the car in 2014, a 2001 V70 2.4T. Loved the heating and cooling system the first few years, I just set it at 72 year round and it was always comfortable. Only problem was that I started getting a puddle under my fee...

Hi all, I have a similar problem -- not enough heat -- but after reading this and some other posts, still not sure what's the best thing to try next. Velorider, did you have a chance to measure those temperatures after the replacement when everything was working well? (Edited: I moved the rest of my...