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Temperature gauge low

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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vidalgerhold
Posts: 1
Joined: 4 August 2022
Year and Model: 2002
Location: usa

Temperature gauge low

Post by vidalgerhold »

Normally it's just slightly over the 1/;2 mark but today, (after our first cold night last night if that means anything) it's the dashboard gauge is low, maybe 1/3rd of the way up. It did rise a bit after 20 minutes or so but still not what it always is. Is that a bad thermostat maybe? -- thank you

454cid
Posts: 1256
Joined: 6 January 2022
Year and Model: 1996 850
Location: United States
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Post by 454cid »

I would suspect a bad thermostat sticking open a bit. Mine was that way when I bought it.
1996 850
1999 S70 GLT (sold after deer hit)

2010 Ford Focus SE
2006 Cadillac CTS
1996 Mercedes C220
1999 Chevrolet K3500
1969 Buick LeSabre Custom 400

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foggydogg
Posts: 2948
Joined: 17 October 2009
Year and Model: '98 V70 R, 97 850 T5
Location: District Of Columbia, not one of the Several States
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Post by foggydogg »

Try unplugging and replugging the connector to the coolant sensor first, it's an easy first step in case the contacts are cheesy, at least on the -'00 cars. If you go for the thermostat, use caution on those torx fasteners; pre-treat with the fluid of your choice for a day or 2, clean the bottom of the hole, nice sharp bit, straight into the head, &c.
And where are you, exactly, that you can describe the weather anywhere in the States as "cold" ? 80 at 8 AM here for me.
69 1800s, @500k Death by Rust
94 850 Turbo, T-boned, ambulance for me, crusher for it
97 855 T5, 855 R projects
98 V70R x2, Silver Junkyard rescue, Coral Red
98 V70GLT x2, parts cars
00 V70xc x2, both now dead
62 122s, gone to live in Richmond
56 445 Duett basket project
1950 Studebaker 2R10 flatbed, T9 crashbox

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