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Car warms at idle, but temperature drops when driving

SC - 1st Gen (1992-2000)

Car warms at idle, but temperature drops when driving

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Old

Feb 17, 2015 | 02:42 PM

#1

tenac2215

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From: MD

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Car warms at idle, but temperature drops when driving

I have a 93 sc400 that seems to warm up only when idling, and then once I start driving, the temperature will start to drop. Them temp will usually drop to a little below the second tick in the temp gauge. I'm thinking this might be te thermostat? Any ideas let me know!

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Feb 17, 2015 | 02:55 PM

#2

SC400slide

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From: NM

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Most likely the thermostat. This will likely affect your heater inside the cabin.

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Old

Feb 17, 2015 | 03:06 PM

#3

tenac2215

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From: MD

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Quote:

Originally Posted by SC400slide

Most likely the thermostat. This will likely affect your heater inside the cabin.

What do you mean? Like the heat doesn't get hot? Because it seems to Not really get warm inside

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Feb 17, 2015 | 04:12 PM

#4

SC400slide

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From: NM

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Quote:

Originally Posted by tenac2215

What do you mean? Like the heat doesn't get hot? Because it seems to Not really get warm inside

If the engine doesn't fully warm up you won't have any hot air from the heater. Your thermostat is likely stuck open. Same thing on my SC...won't get above 2nd tick on the temperature gauge sometimes, resulting in no hot air.

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Feb 17, 2015 | 05:14 PM

#5

tenac2215

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From: MD

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Quote:

Originally Posted by SC400slide

If the engine doesn't fully warm up you won't have any hot air from the heater. Your thermostat is likely stuck open. Same thing on my SC...won't get above 2nd tick on the temperature gauge sometimes, resulting in no hot air.

Alright that's what I was thinking. Just wanted to see some other thoughts. Looks like I'll
Be buying a new thermostat.

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