Heat Exchanger or something else??
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Junior User
Joined: Oct 2007
Posts: 52
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Heat Exchanger or something else??
Just had a cold snap move in where I live and my heat just started going crazy. It is mostly cooler air coming out of the vents but the heat does come in short spurts. Is my heat exchanger starting to go? or is there something else going on?
If it is the heat exchanger, anybody know what they run new and if its worth getting one from the junker.
Anybody replaced one before? any suggestions?
Appreciate any help.
Also, My temp gauge just starting going haywire at the same time. Could this be connected?
If it is the heat exchanger, anybody know what they run new and if its worth getting one from the junker.
Anybody replaced one before? any suggestions?
Appreciate any help.
Also, My temp gauge just starting going haywire at the same time. Could this be connected?
Elder User
Joined: Apr 2007
Posts: 617
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From: Los Alamos
yup.. if the coolant level gets low, it will not maintain flow into the heater core, thus no heat in the cab. Basically it flows hot coolant through a hose to the heater core, under the dash, then returns it to the system through another hose. Temp is then controlled by airflow over/through the heater core for heat.
Also the coolant temp sensor must have contact with coolant to read properly. If the level gets below the sending unit, but still has enough to flow over it occasionally, it will read erratically.
Lemme know what the level is at, we'll go from there, but from what your describing I think your low on coolant. If thats the case, next is to find out where it's going, as that can be bigger problems...If your level is full, next check is actual flow.
Also the coolant temp sensor must have contact with coolant to read properly. If the level gets below the sending unit, but still has enough to flow over it occasionally, it will read erratically.
Lemme know what the level is at, we'll go from there, but from what your describing I think your low on coolant. If thats the case, next is to find out where it's going, as that can be bigger problems...If your level is full, next check is actual flow.
