what's normal ... - Saab 900 Bulletin Board - Saabnet.com
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NORMAL, HEALTHY OPERATION
(with OEM 87C T-Stat, & OEM 92C Fan-Switch)
a) Cruising ..... Runs at 50% on gage (40% with 82C T-stat), warmed up and cruising for 3-5 minutes at 40-60 mph, with AC off. True even in 90F weather. Fans should not be needed cruising.
b) Stopped ..... In hot traffic, stop and go, or at long idle, gage slowly climbs to 2/3, when fans come on, bringing gage back to about 1/2 before shutting off. This is a NORMAL cycle of the system, not a hot problem. In very cold weather, fan trip point will be a little higher on gage (3/4) than in warm weather (due to more free convection cooling of the radiator, and location of fan switch).
------
If heat is avail at 1/3 up on gage, then loss of heat higher on gage is likely t-stat related .... shuts off heater core at wide open condition.
If no heat ever ... search 'no heat'
For cooling fan info, search 'all about fans'
posted by 52.128.3...
Posts in this Thread:
- No heat and climbing temp needle, Marty, Wed, 5 Nov 2003 12:03:16
- Marty, you're likely on the right track, GregR, Fri, 7 Nov 2003 05:28:02
- Maybe the rod connecting the valve to the dial isn't, JJ, Wed, 5 Nov 2003 16:47:21
- Heater valves fail, black, Wed, 5 Nov 2003 16:42:51
- What is coolant level? The loss of heat >>>, BobD, Wed, 5 Nov 2003 14:59:33
- I think you may have a couple of problems..., gds, Wed, 5 Nov 2003 14:22:57
- what's normal ..., Kevin K , Wed, 5 Nov 2003 13:26:26 <-- Viewing This Message
- I had a leaky waterpump last winter..., nt moore, Wed, 5 Nov 2003 12:10:20
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