heat goes cold
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Senior User
Joined: Oct 2009
Posts: 205
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From: white mtns
heat goes cold
i have a 95 ford f350 when u run it with the heat on the truck temp gage says its overheating the heat will go from nice and hot to ice cold as soon as the temp gage goes up to the red i replaced the thermostat also checked for coolant leak cant find any but truck has strong anti freeze smell and the radiator keeps going low on coolant any help would be great
Logistics Pro
Joined: Jan 2002
Posts: 4,907
Likes: 39
From: suburban atlanta
I would guess[!] you have a leak. I would also bet that you don't have enough coolant in the system and have air trapped. That would make the coolant flow in 'surges' into the heater core, and would expose the temp sensor to hot air or coolant depending on the level of the coolant at a given point in time.
Fix your leak [can't have coolant smell unless it is leaking], and make sure you have burped the cooling system to get all the air out. The heater core hoses should *both* be hot when the system is full and the engine is warmed up and running.
tom
Fix your leak [can't have coolant smell unless it is leaking], and make sure you have burped the cooling system to get all the air out. The heater core hoses should *both* be hot when the system is full and the engine is warmed up and running.
tom
