No air flow from air handler, outside unit working

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  #1  
Old 09-28-07, 01:47 PM
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No air flow from air handler, outside unit working

I have a Ruud split system heat pump. While out of town for a week, the air handler stopped moving air. The compressor probably continued to run continuously for about 6 days as the temperature inside the condo rose. There was some ice built up on the cold line coming out of the compressor, and some more ice on the cold line going into the air handler. Thankfully, the return line to the compressor on the roof has about 25 feet of exposed copper, and it was hot out, so I don't think the compressor sucked any liquid (although I am sure it ran up my electricity bill). My questions are as follows:

The air handler, when powered on by the thermostat, makes a quiet buzzing noise but the fan doesn't start. Any ideas on what this means?

The unit is installed in a hard to reach place in the ceiling. I can't get the front cover off the blower housing. How hard is it generally to remove the whole blower housing? Can this be done while leaving the coil housing and the rest of the duct work in place?

How much should it cost to replace the fan motor? How about the whole blower housing? How heavy is the blower housing, I will have to lift it in and out of my kitchen ceiling myself.
 
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  #2  
Old 09-28-07, 08:56 PM
Ed Imeduc's Avatar
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Cant see the unit or know what kind of motor you have there cant say what cost would be. Dont run the the unit outside at all if the indoor blower dont run.
The air handler, when powered on by the thermostat, makes a quiet buzzing noise but the fan doesn't start. Any ideas on what this means?
When calling for the blower can you give the blower wheel a push?? If it runs then can be just the capacitor. Buzzing could be blower relay???
 
  #3  
Old 09-30-07, 05:52 PM
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Originally Posted by akoeppel View Post
I have a Ruud split system heat pump. While out of town for a week, the air handler stopped moving air. The compressor probably continued to run continuously for about 6 days as the temperature inside the condo rose. There was some ice built up on the cold line coming out of the compressor, and some more ice on the cold line going into the air handler. Thankfully, the return line to the compressor on the roof has about 25 feet of exposed copper, and it was hot out, so I don't think the compressor sucked any liquid (although I am sure it ran up my electricity bill). My questions are as follows:

The air handler, when powered on by the thermostat, makes a quiet buzzing noise but the fan doesn't start. Any ideas on what this means?

The unit is installed in a hard to reach place in the ceiling. I can't get the front cover off the blower housing. How hard is it generally to remove the whole blower housing? Can this be done while leaving the coil housing and the rest of the duct work in place?

How much should it cost to replace the fan motor? How about the whole blower housing? How heavy is the blower housing, I will have to lift it in and out of my kitchen ceiling myself.

It sounds like the air handler is flat and is aboove the ceiling? We call those "pancake units" Many of them are made with a double shaft blower motor and 2 blower wheels. They can be a stinker, the entire blower husing has to come out in order to replace the motor. See if you can get the cover off and determine where the buzzing is coming from. Check the relay and capacitor first and try pushing the blower wheel as Ed suggested. If you have to remove the blower housing there has to be some screws to take out in order to drop the housing down out of the unit. it won't be light [maybe 20 to 30 lbs] and you'll be in an awkward position on a ladder so be careful.
 
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