1993 Honda Accord Q&A
1993 Honda Accord Question: Heater
First, make sure the coolant level is OK. If it is, the heater core may be plugged, or the heater valve and/or cable may not be working properly. - munkyrench
Monkeyrench is right check the coolant level first, but a low coolant level on this car often causes a surging idle speed. One simple thing, the black plastic knob that is rotated to operate the heat from hot to cold frequently fail, the knob may appear to turn but does grip the spindle behind it to turn the heater from cold to hot. Pop the knob off, it will pop straight off with gentle pressure from two small screw drives, look at the back of the knob, see if it is cracked in the center, a new one is about $5 and the dealer always has them in stock. Once the car is warmed up and you are driving on the road does the temperature gauge get up to the middle of the gauge, if it remains only 20% or so up the gauge the cooling system Thermostat may be stuck open. - patrick mannion
The distributors on higher mileage vehicles can leak oil onto the heater hose causing the hose to soften and break. Heater hose breakage will cause a coolant leak.
It takes a long time for the heater to get warm. Two hoses in the engine going to heater, one gets hot and the other doesn't.
My heater control light goes off when hot. Sometimes when the weather is cold, it comes back on, but usu...
...laced the passenger side before because the car was under warranty. Now the driver's side seat heater is out. I've replaced the switch but it didn't work. The fuses are all okay. What next?