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Is the Thermo Fan P/N THF340 for the 96 - 98 Taurus a 2-speed equivalent to manufacturer P/N F4DZ 8C607CA

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Sub-zero temps. last 2 nites. vehicle starts/runs fine except for radiator fan that is running at high speed and not allowing engine to warm up.


Try the fan relay first in case its stuck on.
There is a fan switch module as well. Could be in the engine bay by the battery?
Thermo switch is usually on the thermostat housing.
Look at google images or pop into a dealer and ask a tech

Feb 16, 2016 | 2004 Volvo XC70

1 Answer

Why does heater fan only run on high?


The speed control resistor may have failed.

Feb 13, 2016 | 2002 Ford Taurus

2 Answers

Overheating at high speeds on a 67 Mustang. Have replaced thr radiator, water pump, thermostat and flushed the system, still over heats at highway speeds.


Has the fan shroud been altered or is it missing? It helps funnel the air thru the radiator to cool the engine. The fan may have been switched out with an incorrect one at some point, leaving a gap at the shroud which isn't allowing proper air flow.

Aug 23, 2013 | Ford Cars & Trucks

1 Answer

2002 ford taurus fan doesn't work


Does it work on any speed..If not check the relay..If it works on high only,,its the fan resister..If all fails you have to unhook the the fan wire and check for voltage with a test light or multimeter..If you have voltage then the motor is bad

Apr 28, 2012 | 2002 Ford Taurus

1 Answer

Which relay is for the fans on 2001 ford Taurus


There are 2 relays for the cooling fans. They are located in the power distribution box located in the engine compartment (see picture below of location). there is a low speed fan relay located in the number 24 position and a high speed fan relay located in the number 32 position (see layout picture below). If your fans are not working at all you may also want to look at the "maxi" fuse in the number 9 position as that gives power to those relays. i hope this helps and good luck.


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May 12, 2011 | 2001 Ford Taurus

1 Answer

2003 chev malibu blower fan not working in position #1,#2 ,#3.Works fine on #4,#5 Help please


its the heater fan resistor thats causing it. it has coils for different fan speeds, if a coil burns out or breaks. then you will loose that fan speed. to replace resistor, remove glove box to give ya more room so you dont have to stand on your head!! remove insulating panel under glove box. loosen and slide ecm to the side. now you can see heater blower fan, resistor is beside it, just remove wires , take out the hold down screws. and thats it!

Jul 26, 2010 | 2002 Ford Taurus

1 Answer

How can I bypass thermo fan switch on honda accord 94


Simple take out the 2 wires that come to the thermo fan switch,then connect the 2 wires together,then the work is done ,then as you start the engine the fan will work constantly.

Mar 13, 2010 | 1994 Honda Accord

1 Answer

I'm trying to find out how many cooling fan relays are in a 1999 Ford Taurus SE with the 3.0L Vulcan OHV engine. This model year has done away with the CCRM (Constant Control Relay Module), so the relays...


fuse #9 protects the 2 cooling fan relays.

It looks like the hgh speed cooling fan realy is in a thin box mounted sideways between the battery and fender.

It has high speed relay, autolamp relay, autolamp headlamp relay, horn relay, washer motor relay, wiper hi/lo relay, wiper park relay.

Section 03-03: Engine Cooling 1999 Taurus, Sable Workshop Manual
DESCRIPTION AND OPERATION Electrical System NOTE: With A/C ON, the cooling fan motors will run continuously. Cooling fan motors will not cycle ON and OFF with A/C clutch (2884) .

NOTE: An exception to this is when vehicle speed is over 61 km/h (38 mph) and coolant temperature is below 100°C (212°F), and A/C head pressure is below 1.71 MPA (250 psi). The cooling fan motors will then automatically shut off.

The cooling fan motors are mounted within a fan shroud (8146) behind the radiator (8005) .

Engine Cooling Fan Control CCRM Applications The PCM monitors certain parameters (such as engine coolant temperature, vehicle speed, A/C on/off status, A/C pressure, etc) to determine engine cooling fan needs. The PCM controls the fan operation through the Fan Control (FC) output (single speed fan applications) or the Low Fan Control (LFC) and High Fan Control (HFC) outputs as shown in Table 2. Although the fan control (FC), low speed fan control and high speed fan control relays are normally open relays, the FC/LFC circuit is wired through a voltage inverter inside the CCRM. The voltage inverter ensures that the PCM must turn on (ground) the FC/LFC output to turn the fan off. This is done so the cooling fan will operate in the event of an open FC/LFC circuit.

Stand-Alone Fan Control Relay Applications The PCM monitors certain parameters (such as engine coolant temperature, vehicle speed, A/C on/off status, A/C pressure, etc) to determine engine cooling fan needs. The PCM determines engine cooling fan control requirements and controls the fan operation through the Low Fan Control (LFC) and High Fan Control (HFC) outputs (Table 3).

Jun 29, 2009 | 1999 Ford Taurus

1 Answer

95 taurus stalls out when temperature exceeds 102. The temperature gage seems to be in the normal range , when this occurs. Once car has cooled off, it drives fine. I have read that the 95 Taurus has had...


your evaprative emissions could be purging into the engine at that point too, giving too rich a mixture.

here's what you are referring to:

ISSUE: A reduced power, hesitation, stalling at low vehicle speed, idling and/or a no start condition may occur on some vehicles in hot ambient temperatures and/or high altitudes. In addition, a no start may result while the engine is still hot and the vehicle has been parked for a short period. A stall may also occur when moving the vehicle from idle. This may be caused by a lack of vapor ports in the fuel pump, resulting in a vapor lock condition or internal high wear of the fuel pump components due to tank contaminants.
ACTION: Perform normal diagnostic routines as described in the appropriate year Powertrain Control/Emissions Diagnosis Manual (PC/ED). If the condition still exists after all diagnostics are followed, replace the fuel pump with a new turbine fuel pump. Refer to the following Part Application Chart for correct part usage. Also, replace in-line fuel filter with a new filter (E7DZ-9155-A). The new turbine fuel pump will reduce the possibility of vapor lock in high ambient temperatures. Refer to the appropriate model/year Service Manual for removal and installation procedures.

PART APPLICATION CHART Model Year Vehicle Application Part Number 1986-95 Taurus/Sable 16 gal. tank - analog cluster F4DZ-9H307-A 1986-95 Taurus/Sable 18.6 gal. tank - analog cluster F4DZ-9H307-B 1988-94 Continental 18.6 gal. tank - electronic cluster F4DZ-9H307-B 1986-89 Taurus/Sable 18.6 gal. tank - electronic cluster F4DZ-9H307-A 1990-95 Taurus/Sable 18.6 gal. tank - electronic cluster F4DZ-9H307-C

PART NUMBER PART NAME F4DZ-9H307-A Fuel Pump And Sender Assembly F4DZ-9H307-B Fuel Pump And Sender Assembly F4DZ-9H307-C Fuel Pump And Sender Assembly F4PZ-9H307-A Fuel Pump And Sender Assembly E7DZ-9155-A Fuel Filter

Apr 22, 2009 | 1995 Ford Taurus

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