Heater Blows Continuously
#1
New Member
Thread Starter
Join Date: Mar 2009
Posts: 8

NEW NOTE: I replaced two vacuum hoses during the engine replacement. Could I have connected them wrong ? Could it be a vacuum issue ?
I have a 99 4WD Blazer. Replaced the engine myself last weekend and now hot air blows all the time in the vehicle, even with A/C on. Did I cross the heater core hoses or something else ? Must be related to the engine replacement, but the Blazer runs great now except for the hot air. Thanks, thanks, thanks in advance.
I have a 99 4WD Blazer. Replaced the engine myself last weekend and now hot air blows all the time in the vehicle, even with A/C on. Did I cross the heater core hoses or something else ? Must be related to the engine replacement, but the Blazer runs great now except for the hot air. Thanks, thanks, thanks in advance.
#2
Starting Member
Join Date: Jul 2012
Posts: 2

My heater in my 96 blazer heater is giving off heat all the time also after I accidentally left interior lite on and ran battery down. Air conditioner now when turned on blows heater air also. Checked fuses, and don't know what else it could be.
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