2001 Mazda 626 ran hot this morn in 10 degree weather
This morning on a short drive to take kids to school, the heater would not ever heat up. Finally, on my way back home, it did get warm, but I noticed the engine was hot. I quickly turned off the heater and the temp gauge went down some. My a/c has been squealing for a long time. Had the air compressor replaced, but it still squeals. Any ideas?
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The first thing you need done here is to have the dealer or a shop scan the ECM (computer) for fault codes, this could be just a defective electronic engine control sensor like a crankshaft sensor or a defective ICM (ignition module). So before you do anything else have the scan done with the special scan tool required.
You may have a oil or a coolant leak and it is getting on belts. try using a garden hose ans wash off belts and see if noise goes away than look for leak and get back to meI would be more than glad to help. Also your battery may be weak that why you would start this morning. Good luck and thanks for using FIX YA
You can put a higher temp thermostat and that should help, but it should at least have 170 degree air right now if it was working right. There are two other things you might check for, the diverter door make some sound when you switch from heat to cool and back, I can't tell you for sure if it is a manual, vacumn or electric but that would definitely cause it to blow cold air. There is also a valve which cuts off circulation to the heater core when your not using it. This valve will be in line with the heater hoses going to your heater core. I have seen some that were actually part of the heater core box. I feel pretty sure one of these will be your problem. Also if your car is low on coolant it would not heat properly. Hope this can help you!