1994 Ford Ranger Engine temp not getting above cool.

Tiny
OLDRELIABLE
  • MEMBER
  • 1994 FORD RANGER
  • 4 CYL
  • 2WD
  • MANUAL
  • 210,000 MILES
I replaced the thermostat because I wasn't getting any heat and that the engine never warms up. I still get the same issue. I went to a local autoparts place and they said that there are two different thermostats for my truck. Which one do I use?
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Thursday, July 30th, 2009 AT 5:27 PM

3 Replies

Tiny
MERLIN2021
  • EXPERT
Here's the TSB from Ford on this problem, FLUSH enging real well and use the new Ford Tstat, part number YS4Z-8575-AA
2.3L/2.5L - DTC P0125 - LACK OF HEAT FROM HEATER TECHNICAL SERVICE BULLETIN Reference Number(s): 99-16-2, Date of Issue: August 9, 1999 Related Ref Number(s): 99-16-2 ARTICLE BEGINNING CONDITIONS LAMP - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED WITH DIAGNOSTIC TROUBLE CODE (DTC) P0125 STORED IN MEMORY - LACK OF HEAT - VEHICLES WITH 2.3L OR 2.5L ENGINE COOLING SYSTEM - LACK OF HEAT - VEHICLES WITH 2.3L OR 2.5L ENGINE APPLICATION Model(s): Ford: 1993-1999 Ranger Bulletin No: 99-16-2 Date: August 9, 1999 ISSUE The Malfunction Indicator Lamp (MIL) may illuminate with Diagnostic Trouble Code (DTC) P0125 stored in memory, and/or a lack of heat with the climate control may occur on some vehicles. This may be caused by sand from the engine block casting getting trapped within the thermostat mechanism. ACTION Replace thermostat with a revised thermostat. Refer to the following SERVICE PROCEDURE for details. SERVICE PROCEDURE 1. Verify concern. 2. Flush the cooling system as outlined in the appropriate year Ranger Service/Workshop Manual. 3. Replace thermostat with revised Thermostat (YS4Z-8575-AA). Refer to the appropriate year Ranger Service/Workshop Manual for thermostat removal and replacement procedures. 4. Fill cooling system with appropriate mix of Engine Coolant (E2FZ-19549-AA) and water. 5. After repairing, verify normal engine operating temperature and normal heat air flow through the climate control. Page 1 of 2 2.3L/2.5L - DTC P0125 - LACK OF HEAT FROM HEATER -1994 Ford Ranger
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Thursday, July 30th, 2009 AT 6:05 PM
Tiny
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Thanks for the answer. I will be getting a new tstat.

What would be the best way to flush the system without getting coolant all over my driveway? Is there a way?
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Friday, July 31st, 2009 AT 3:24 PM
Tiny
MERLIN2021
  • EXPERT
First get a pan that is made for draining radiators, then drain it into the pan, then flush it out according to the manufacturs instructions.
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Saturday, August 1st, 2009 AT 3:43 PM

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