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Thermostat We are having a problem adjusting the thermostat. Could you please explain which direction to move the indicater arrow to allow the air conditioning to run less?

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You move the adjustment to a higher setting. Also make sure that there are no heat sources that may affect the thermostat like lamps, TV's or sun shine .

Posted on May 09, 2008

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Some thermostats allow you to change the differential value - that is how far below the heating (or above the cooling) set point before calling for heat (or cooling in the case of air conditioning). The built in 1 degree differential setting provides the most even temperature in the space at the expense of more frequent furnace firing and stopping. Many people prefer this mode as opposed to allowing wider swings in temperature for less frequent furnace firing and stopping. If you wish to change this setting, you'll need to replace the thermostat as it is not user adjustable in this model.

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Does the 1993 nissan sentra need its thermostat


Running an engine without a thermostat will allow it to run too cold. This will cause oil problems and fuel efficiency problems. The computer will make adjustments for a cold engine which will affect idle speed, timing, and pollution controls. You may have a plugged radiator or a water pump not moving enough water or a bad thermostat. The cost of a thermostat is much less than the damage you will cause running without one. If the radiator is plugged. running without a thermostat will not solve the over heating condition.

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How do I replace the fan and air condition belts on a RAV 4 Toyota 1999


Loosen off the tensioner pulley in order to loosen the belt. First, loosen the bolt in the center of the pulley in order for it to be able to move, then turn the long adjuster bolt off to the side of the pulley in the bracket, and then the position of the pulley will change, allowing you to loosen it enough to get the belt off. Kind of hard to explain, but look for the pulley that is all by itself that doesn't turn anything...that is the one that adjusts the belt.

Aug 21, 2011 | Toyota RAV4 Cars & Trucks

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How and where do i change the thermostat in my van


Hello dcb. The thermostat is located in the hose coming from the radiator and is located on the top of the engine on the right side. If you remove the air breather box first it will give you some room to work but the back bolt on the thermostat is really difficult to get out due to lack of room to move the wrench. Make sure the coolant is not hot before you begin. MAKE A NOTE OF THE ARROW ON THE THERMOSTAT INDICATING THE DIRECTION OF FLOW SO YOU CAN MOUNT THE NEW ONE IN THE SAME DIRECTION. Make sure you have the necessary wrenches to remove each bolt, and have the new thermostat and gasket ready to install.

All you do is lower the level of coolant within the radiator by opening the lower stop **** [unless the level is already down], then remove the two bolts and use a putty knife blade to loosen the gasket which is usually somewhat "welded" to the thermostat. Once you have the old thermostat out, scrape off any remaining gasket material and then install the new gasket and thermostat paying attention to make sure the new thermostat direction arrow is pointing in the same direction as the old one did.



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Dec 06, 2010 | 1998 Oldsmobile Silhouette

1 Answer

I am helping change a thermostat - (we have no manual) where exactly is the thermostat located. This is a 4 cyl, standard trans, 2WD, speedo stopped working at 225K. Heater went out about 6 months ago, AC...


The thermostat cannot cause your heater to go out, though the heater will run a little cooler if the thermostat is stuck open. Please see my tip at http://www.fixya.com/cars/r6235876-no_heat_fan_blowing_cold_air to troubleshoot the heater. In particular, I would start by checking the temperature control cable adjustments. I have pasted instructions from autozone.com below.

If you really want to change the thermostat, please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat . The thermostat is in the housing at the end of the upper radiator hose.

For the speedo, It's probably a broken cable. Have someone take the cable off the tranny and spin the cable in their fingers while you watch the speedo. If the speedo works, the problem is with the gear in the tranny, else the cable is broke.

Let me know if you have more questions along your journey. :o)



Heater temperature control cables to blend door and heater water valve--adjustment:
WATER VALVE CONTROL ROD

See Figure 8
When adjusting the water valve control rod, disconnect the temperature control cable at the air mix door lever and then adjust air mix door control cable. Next, adjust the control rod. Reconnect the temperature control cable and then readjust it.
  1. Push the air mix door lever in the correct direction.
  2. Pull the control rod in the direction shown (in the accompanying illustration) until there is an 0.08 in. (2mm) clearance between the ends of the rod and link lever. Connect the rod to the door lever.
jturcotte_114.gif

TEMPERATURE CONTROL CABLE
See Figure 9
Move the temperature control lever to the cold position. Push the cable sheathing and the air mix door lever in the correct and then tighten the clamp. Verify proper operation.

jturcotte_115.gif

Nov 08, 2010 | 1992 Nissan Pickup

1 Answer

Need to know how to adjust the valves


On Vehicle Inspection If a clanging noise due to the lash adjuster produced immediately after the engine has started or during operation persists, perform the following checks:
  1. Check the engine oil, and add or replace if necessary.
    1. If the engine oil is low, the air drawn in from the oil strainer will be trapped in the oil passage.
    2. If the engine oil level is higher than the specified level, agitation of oil by the crankshaft could cause a large amount of air to enter the oil.
    3. A deteriorated oil contains a large amount of air, because the air, once trapped, is not readily separated from the oil. If the air trapped due to these causes enters the high pressure chamber in the lash adjuster, the air in the high pressure chamber will be compressed while the valve is in the opened position. The lash adjuster will be drawn too far in, and will produce noise when the valve closes. This is the same phenomenon that occurs when the valve clearance is adjusted to an excessive dimension. Fig. 1: Check the valves with the white arrows, rotate the crankshaft 360°, then check the valves with the black arrows — 2.0L, 2.3L, 2.4L and 2.6L Engines 86663205.gif
      Fig. 2: Check the valves with the white arrows, rotate the crankshaft 360°, then check the valves with the black arrows — 3.0L (12 Valve) Engines 86663206.gif
      Fig. 3: Check the valves with the white arrows, rotate the crankshaft 360°, then check the valves with the black arrows — 3.0L (24 Valve) Engines 86663236.gif
      Fig. 4: Check the valves with the white arrows, rotate the crankshaft 360°, then check the valves with the black arrows — 3.5L Engines 86663207.gif
      Fig. 5: Push the rocker arm to check if the rocker moves down or not — all engines except for the 3.5L Engines. 86663208.gif
      Fig. 6: Push the rocker arm to check if the rocker moves down or not — 3.5L Engines. 86663210.gif
      In this case, the normal condition will be restored if the air escapes from the lash adjuster.
  2. Start the engine and slowly race (accelerate the engine from idling speed to 3,000 rpm in 30 seconds and then decelerate it to the idling speed in 30 seconds) it several times (less than 10 times). If racing the engine causes the noise to die away, it means that the air has escaped from the high pressure chamber of the lash adjuster and that the lash adjuster has regained its normal functions.
    1. When the vehicle is parked on a slope for a long period of time, the oil in the lash adjuster will decrease. When the engine is started, the air might enter the high pressure chamber.
    2. After a long period of parking during which the oil in the oil passage goes away, it will take some time before the oil is re-supplied to the lash adjuster. Therefore, the air could enter the high pressure chamber.
  3. If any abnormal noise is not eliminated by racing, check the lash adjuster.
    1. Stop the engine.
    2. Set the engine so that cylinder No. 1 is positioned at the top dead center of the compression stroke.
    3. Press the rocker arm at the area indicated by the white arrow mark to check whether the rocker arm is lowered or not.
    4. Slowly turn the crankshaft 360°clockwise.
    5. In the same procedure as step "c'', check the rocker arm at the area indicated by the black arrow mark.
    6. Push down the rocker arm at a portion located right above the lash adjuster. If the rocker arm goes down readily, the lash adjuster is defective. Replace it with a new one in accordance with Step 4. In addition, when replacing the lash adjuster, be sure to remove air positively from the lash adjuster before installation. Then perform inspection in accordance with steps "a'' through "e'' to make sure that there is no abnormality. In addition, if the rocker arm is felt to be very stiff or cannot be pushed down when it is pushed, the lash adjuster is in the normal condition. Therefore, check for other causes of noise.
Bleeding and Checking When cleaning or checking the lash adjusters, use only clean diesel fuel. To test the lash adjusters, follow this procedure.
  1. Immerse the lash adjuster in clean diesel fuel.
  2. While lightly pushing down the inner steel ball using a small wire, move the plunger up and down four or five times to bleed air. The use of the retainer facilitates the air bleeding of the rocker arm mounted type lash adjuster.
  3. Remove the small wire and press the plunger in. If the plunger is hard to be pushed in, the lash adjuster is normal. If the plunger can be pushed in all the way readily, bleed the lash adjuster again and test again. If the plunger is still loose, replace the lash adjuster. NOTE: Upon completion of bleeding the air out of the lash adjuster, hold the adjuster upright to avoid the diesel fuel from spilling.
  4. After air bleeding, set the lash adjuster on the special tool (leak down tester MD998440).
  5. After the plunger has gone down somewhat 0.008–0.020 in. (0.2–0.5mm), measure the time needed for it to go down an additional 0.04 in. (1mm). Replace if the measured time is not between 4–20 seconds.
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Sep 06, 2010 | 1991 Mitsubishi Mighty Max

1 Answer

I have land cruiser wagen model 1995 the proplem in air conditioner when oprate the plower switch to low or m1 or m2 or high is ok but when moving the thermostat to hot the blower motor is not working.


In some models the air conditioning system and the heating system are separate and you need to switch off the aircon if you use the heater. Or if it is a heatpump system, the fan will switch off while it is in reverse cycle allowing pressure to build up and heat to be generated in the evaporator side. This is particularly true if you change directly from cooling to heating.

Oct 26, 2009 | Heating & Cooling

1 Answer

Heater not blowing warm air. Thermostat has been


Check the water control valve behind the engine close to the firewall. This valve opens and closes to allow hot coolant to enter the heater core. It is usually connected to the heater controls with a cable. When you adjust the heater control for heat, a cable activated lever on the valve should move and allow coolant to move through the valve. The cable from the heater control can come loose from the lever, or the valve itself can become corroded and hard to move.

Oct 16, 2009 | 1993 GMC Sierra

1 Answer

Adjusting contrast on phone


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