Thermostat
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Junior User
Joined: Apr 2003
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Thermostat
I recently purchased a 95 F150 6 cyl. The temp rises gradually to about 1/4 of the range and I am assuming that the thermostat has failed in the open position. No sure how long it has been this way but will replace it soon.
Any problems that this could cause. Running too rich, running at lower than designed temps? Any difference in thermostats out there?
Any problems that this could cause. Running too rich, running at lower than designed temps? Any difference in thermostats out there?
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Thermostat
Originally posted by TwoF150
The temp rises gradually to about 1/4 of the range
The temp rises gradually to about 1/4 of the range
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Junior User
Joined: Apr 2003
Posts: 91
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Thermostat
The vehicles that I have owned previously came to mid range then opened and the water was circulated and the temp guage went down a little and back up.
If you guys say this is the normal operation for this vehicle it is one less thing to fix.
If you guys say this is the normal operation for this vehicle it is one less thing to fix.
Postmaster
Joined: Mar 2001
Posts: 4,968
Likes: 3
From: So Cal
Thermostat
Sounds normal. Keep in mind our gauges are not laboratory quality. All they can do is tell you...
Cold, cool, wamr, hot, really hot. The reading is all relative. I would only worry if it regularly rode at 3/4 or more. Or, if it takes half an hour of freeway driving to get to 1/4, then I might suspect a bad thermo.
If the heater is running within say 5 minutes of starting and the heat is good, then you are probably fine.
Good Luck,
Jim Henderson
Cold, cool, wamr, hot, really hot. The reading is all relative. I would only worry if it regularly rode at 3/4 or more. Or, if it takes half an hour of freeway driving to get to 1/4, then I might suspect a bad thermo.
If the heater is running within say 5 minutes of starting and the heat is good, then you are probably fine.
Good Luck,
Jim Henderson
Tuned
Joined: Jan 2003
Posts: 377
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Thermostat
I would change the thermostat either way. Every used vehicle I buy that's the first thing I do is change the thermostat. We're talking about $7.00 and the coolant probably needs flushed anyway. VERY cheap peace of mind.
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Junior User
Joined: Apr 2003
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Thermostat
The heater works fine. I am only concerned if the engine is not running at the proper temp or too rich for too long due to lower temp.
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New User
Joined: Apr 2003
Posts: 4
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Thermostat
I had a thermostat get stuck in the open position, and my truck wouldn't even warm up enough to show in the NORMAL range. From what I understand, if it is stuck open, it will take a long time to warm up, if it ever does warm up, and if it is stuck closed, it will warm up to a higher than normal temp, but I would say that if your temp gauge is showing somewhere on the "O" or "R", it is fine.
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