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Heater Diagnosis 200 1993

Hello All,

I would like to start by asking "Car 54 Where Are You?, but this is serious business so without further adieu,

93 244 with 115K.

Sonny boy borrowed the car for a 500 mi trip. Yesterday, he complained that the heater wasn't working when it was first started in the AM. He said it suddenly began to work (I think he may have been talking about the blower), and smelled rancid.

Today when I used the car for a 50 mile ride, I noted that the blower motor does not appear to be as quiet as it used to be, but in the garage, it did go through the 4 speeds. When I ran the car, and used the defroster, I couldn't obtain a good assessment as to whether the defrosters were contributing to the moisture, because we just had a few inches of snow and there was a lot of moisture in the car. There seemed an odd odor (I can't say whether it was sweet or otherwise), which got my attention. However, later in the trip, it seemed to go away, so I can't be sure about any odor.

I will likely run the car some more to see if anything develops, but I'd like to know a little more from informed people here on the BB.

In reading the FAQ's, it seems it would be unlikely that the heater core went (or is going). I pulled both side kick panels off to get a look see, but being kind of inexperienced, don't know exactly what I'm looking for except I saw no wetness, nor is there any wetness around drivers or passengers feet. Further, I'm really not losing any coolant (except a small leak at the water pump o-ring (that's for another day). In addition, I pried the console back to get a look in that way (without disconnecting any of the connectors), without seeing anything particularly disturbing. I've seen posts on the heater valve, but through the birds nest of wires, relays, etc, it's tough to know what I'm looking for and where.

If someone could provide a step by step, it would be most helpful. There may actually be nothing wrong with the heater, I'm not sure, but I'd like to know how to better diagnose the system.

Thanks very much for sharing your know-how.

Marty Wolfson
--
93 244 185K, 93 244 112K, 93 245 116K (in California now), 99 V-70 89K






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