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Bottom accuwaiter temp valve - 2002 GMC Yukon XL

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Which way does the thermostat sit in the housing?

looking at the thermostat there is a top section and a bottom section where the spring and wax bulb is located
that wax bulb section has to face the head water or block water as it requires the water temp to enlarger the wax bulb and open the valve letting water through to the top hose or in from the bottom hose
you didn't mention the make of car so be aware that some are in the top radiator housing in the head and others are in the bottom hose housing into the block
which ever you have the bulk of the thermostat goes into the hot water.

Mar 24, 2017 | Cars & Trucks

1 Answer

Temperature gauge

heater core air pocket, or the valve are the first places to look.see if valve is opening & you have a good 50/50 mix of coolant

Dec 25, 2013 | 1989 Ford F 150

1 Answer

No heat new thermostat blows good was told may be valve going to hoses $200 tofix where can that be foun d is it easy fix?

easy is in the eye of the beholder and skill sets.
you could read the manual (FSM) and assess that for your self.
so you are saying the engine coolant thermostat is good and is at
180F or more all the time , hot, holding.
and that this hot coolant fails to reach the heater core?
it can only be 2 things,
1: that valve some cars have.
2: or path is clogged.
3: some cars have a damper that blocks the core , so if that is stuck then bingo.

may be? why guess. do the tests to find the facts.
or guess and guess wrong.
if you really want the facts, go to $15 year DIY subs.
and read the HVAC section,
or get the Full FSM from Honda or Helm.? or anywhere.

in the book they tell you how to conduct these simple tests.

here is the heater valve test.
there are 2 water hoses from engine to cab, on right hand side
of RHD car. (usa)
a top hose
and bottom hose.
the bottom hose has a valve there.
the test:
engine hot. 180F +
heater on max. fan max too.
both sides of vavle, that is both sides of valve hoses
just be real hot, so hot hand jumps back after 5sec touch.
this is NORMAL.
if not hot both sides, the coolant is NOT flowing.
if not flowing , make sure valve is opening on demand.
if it is , this path is filthy and is packed up. (forgot the 2year flush and fill?s)

the valve is cable operated
have person one adjust dash temp lever from min to max
then person two ,look at the water valve , does that lever, move
from min to max.>?
the cable must be adjusted, if (messed with prev.)
dash temp to 60F.
take out all slick at cable, at valve, using. cable clamp next to valve.
keep in mind , if the heater core,is cold.
the valve is bad, stuck or clogged
or the core is packed in crud
or the hoses associated to all this are packed.

i can tell you guessing will be expensive.

Oct 25, 2013 | 2002 Honda Odyssey

1 Answer

Heater blows cool air in winter

is it a manual sliding valve or a computer regulated temp valve ? could also be the temp gauge.

Feb 10, 2013 | 2009 Ford Edge SEL

1 Answer

2002 lincoln ls blows cool air on driver side but warm air on passenger side

It is likely that the Coolant Control Valve on your car has failed. This valve is located on the passenger side of the radiator fan shroud near the bottom and has 3 coolant hoses connected to it. This valve regulates interior duct temp by changing the amount of water flow to the heater system.

Jul 30, 2010 | 2002 Lincoln LS

2 Answers

Heater problem

Ok, some clues, good. When the jeep has been driven for 10minutes, it should be at operating temperature. What does the temp. gauge indicate at that time? Is it on the low (cold) side, in the middle (normal) or near the hot end of the temp. gauge? Let me know the answer to the above, also check to coolant level and let me know what you find. If the coolant level is low, it can result in the engine running hot, and result in no heat. When the level is low, it won't circulate coolant through the heater core, which means you won't have heat. So let me know about the engine temp, and the coolant level, this is the easiest and simplest possibility of why you don't have heat. If this isn't the problem, do not rate my answer until I can help further after I get the above info from you.

Nov 23, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Tranny q for a 05 ford f 150 4x4

sure it was the tranny and not the accuwaiter switch gone bad on you .smell to see if the fluid has a burnt smell to it .did it show signs of it going .was it wet out that day ? would it go into reverse it should have had something .was the levels right up on it and was it top up with mercon5 not with something else ?

Feb 16, 2009 | 2005 Ford F-150

1 Answer

No heat from heater on 01 sonoma x cab

therostat stuck , or add anti freeze to reservoir if low

Jan 03, 2009 | 2001 GMC Sonoma Extended Cab

1 Answer

1992 toyota tercel

As temp increases the air becomes less dense. So if your car is running rich (to much fuel) it will starve for air when it gets hotter. Look at your spark plugs for excess fuel. Also see if your idle control valve is working. Its the valve at the end of your fuel rail, closeest to #1 cyc. It should have one vacuum hose hooked to it at the bottom. Let me know what you find.

Jun 21, 2008 | 1992 Toyota Tercel

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