Heater Blows here but.............. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72superBB · 01-05-2004, 11:19 PM

My heater blows out the defrost on the dash, but will not blow anywhere else. The lever that moves the cable hooked to the lever that you can see from the seat on the front hardly moves at all. Any suggestions as what to do.

Also, what temperature of thermostat will allow the truck to become warmer faster?

THanks

Ron

Blue Beard · 01-05-2004, 11:29 PM

Your problem with the heater more than likely is the diverter box gate.

Mine has AC and had the same problem.

The gate in the box is plastic with a rubber seal around it. Breaks near the pivot point.

I bought a new one for about half price.

Try:

http://www.gmpartsdirect.com

http://www.partszoneonline.com

As far as the thermostat, I believe the stock is around 180 degrees...........

72superBB · 01-05-2004, 11:32 PM

Both of those places only go back to 1980. What now?

I guess I can take the thing apart and see what I find.

Ron

71chevylongbed · 01-05-2004, 11:48 PM

your engine can only warm up so fast no matter what thermostat it has in it. the thermostat just controls the max temp the engine can get to

Blue Beard · 01-06-2004, 12:19 AM

Sorry, forgot to mention........

They do go back farther than 1980, just need a part number which is on the broken gate.

Give them a call, I bought mine from one of those. Can't remember which one.

I still have the old one from my truck, if I can find it.

Just ask for the diverter box for the year you need along with if its for an AC or non AC truck.

They should be able to help you.

I think the cost was around $50 for a new one last year....

walker · 01-06-2004, 12:21 AM

If your t-stat is stuck open then your engine will not heat up as fast. Just go buy a new one. 180 degree seems to be pretty common. I think the 160 degree ones are a little to cool.

VTKidder · 01-06-2004, 12:35 PM

Quote:

Originally posted by 72superBB
Both of those places only go back to 1980. What now?

Put up a wanted thread on the parts board. I'm sure you'll find a very nice diverter box that someone wants to sell by the end of the day. I know of a couple people here that have 6 or 7 on hand.

01-05-2004, 11:19 PM	#1
72superBB Registered User Join Date: Nov 2003 Location: Mandan, ND Posts: 422	Heater Blows here but.............. My heater blows out the defrost on the dash, but will not blow anywhere else. The lever that moves the cable hooked to the lever that you can see from the seat on the front hardly moves at all. Any suggestions as what to do. Also, what temperature of thermostat will allow the truck to become warmer faster? THanks Ron __________________ Life is full of choices and a Chevy is the best choice. 1990 Chevy SWB

01-05-2004, 11:29 PM	#2
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,831	Your problem with the heater more than likely is the diverter box gate. Mine has AC and had the same problem. The gate in the box is plastic with a rubber seal around it. Breaks near the pivot point. I bought a new one for about half price. Try: http://www.gmpartsdirect.com http://www.partszoneonline.com As far as the thermostat, I believe the stock is around 180 degrees........... __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

01-05-2004, 11:32 PM	#3
72superBB Registered User Join Date: Nov 2003 Location: Mandan, ND Posts: 422	Both of those places only go back to 1980. What now? I guess I can take the thing apart and see what I find. Ron __________________ Life is full of choices and a Chevy is the best choice. 1990 Chevy SWB

01-05-2004, 11:48 PM	#4
71chevylongbed Got Horsepower? Join Date: Sep 2003 Location: IDAHO Posts: 406	your engine can only warm up so fast no matter what thermostat it has in it. the thermostat just controls the max temp the engine can get to __________________ 2001 Dodge 2500 Cummins, 4 inch lift, 35" Toyo MT's on Ultra wheels, P-Pump Conversion, AFE intake, Fass, 5 inch exhaust, Pyro,Boost,and Fuel pressure guages, and a whole bunch of other stuff "The Money Pit" SOLD-71 Chevy C10 long bed- 2/4 drop-- 350,th400, Edelbrock performer RPM intake,Edelbrock 600 CFM carb,Crower 240 cam,port and polish,Dynomax headers,HEI ignition,dual 2.5 inch exhaust with Flowmaster 50 series mufflers

01-06-2004, 12:19 AM	#5
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,831	Sorry, forgot to mention........ They do go back farther than 1980, just need a part number which is on the broken gate. Give them a call, I bought mine from one of those. Can't remember which one. I still have the old one from my truck, if I can find it. Just ask for the diverter box for the year you need along with if its for an AC or non AC truck. They should be able to help you. I think the cost was around $50 for a new one last year.... __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

01-06-2004, 12:21 AM	#6
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	If your t-stat is stuck open then your engine will not heat up as fast. Just go buy a new one. 180 degree seems to be pretty common. I think the 160 degree ones are a little to cool. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold



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