Volvo XC70 This wagon/SUV crossover offers the capabilities of an SUV without SUV size.

Heater not really heating

Old 01-05-2009, 10:15 PM
Thread Starter
Join Date: Jan 2009
Posts: 1
Default Heater not really heating

I have a '99 V70 XC. About three weeks ago, my low coolant light came on. Prior to that I had never even seen the coolant reservoir below the full line. The reservoir was actually empty, so I filled it up. (I never did see any leaking coolant on the garage floor). Since then, it seems like the heat coming into the cabin is warm, but not blistering hot and the cabin never gets overly hot. On Christmas morning I was driving from Indianapolis to Tulsa. When I left, it was about 15 degrees outside. I don't think the cabin temperature rose above 65 regardless of the fan speed until the outside temp got over 25 degrees (after the sun came up). The water temp gauge stayed down at the bottom of the scale unless the transmission downshifted to maintain speed up a hill. Then it would rapidly swing up to it's usual roughly horizontal position. As soon as the transmissionupshifted again, the temp gauge dropped back down to the botom of the scale again.

The reservoir is still full, but is there air in the cooling system that is keeping full flow of coolant from going to the heater core? If so, what is the best way to bleed the air out? What else might it be?
Old 01-05-2009, 10:37 PM
tech's Avatar
Join Date: Sep 2004
Location: Orlando, Florida
Posts: 36,351
Default RE: Heater not really heating

I would bet the thermostat is bad.
Related Topics
Thread Starter
Last Post
Volvo 240, 740 & 940
03-06-2013 10:02 PM
Off Topic
05-11-2011 01:08 AM
Volvo 240, 740 & 940
07-28-2010 10:36 PM
Volvo S70
04-07-2007 08:36 PM
Volvo S60 & V60
03-24-2007 07:57 PM

Thread Tools
Search this Thread
Quick Reply: Heater not really heating

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.