smitty8567
Active Expediter
I have a comfort master APU unit. I turn it on and it will run for about an hour of running then it will shut down and show "temperature reading high". Do you have any suggestions and how to solve this problem.
APU unit question
- Thread starter smitty8567
- Start date
Welcome to the forums.
Other than checking the oil/coolant I don't know what to say. Is it stand alone or tied into the truck cooling system.
Other than checking the oil/coolant I don't know what to say. Is it stand alone or tied into the truck cooling system.
The condenser fan failing could cause that to happen.
what temp is high, water temp ? or A/C system ?
do you have the op's book for the APU it should have a list of the codes.
the coils for the cond. or rad. may be dirty, if the fan wasn't working it wouldn't run for a hour.
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purgoose10
Veteran Expediter
If the unit is fairly new it could be a sensor and or where the condensor is mounted. The condensor fan might not be able to pull enough air through the condensor to cool it. It's not getting the air and it has cycled (shut off) for any amount of time it could cause the sensor to go bad. A lot of times they will mount a condensor and fan against the cab. Thats fine if you have spacers between the mounts and the cab allowing air to flow. If the unit is less than about two inchs from the cab, it's not getting enough air. I had the same problem with a unit years ago and that was it, so passing on experience.
I might ad something. In the summer when running west or anywhere that the temps get really high the cab is not only getting hot from the sun it is picking up ashphalt heat. When the cab get that hot the fan on the condensor is just pulling that heat and helping to heat the condensor.
I might ad something. In the summer when running west or anywhere that the temps get really high the cab is not only getting hot from the sun it is picking up ashphalt heat. When the cab get that hot the fan on the condensor is just pulling that heat and helping to heat the condensor.
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There are advantages and disadvantages to being plumbed into the truck. It is a personal choice as to which problems a person wants. The Honda is gas. That is a second fuel supply that needs to be carried. Also my APU will come on by itself when the batteries get too low. The Honda won't. In the case of my truck I would have to do modifications to the roof to be able to put a roof mount AC to use with the Honda or Onan. It is never as simple as it seems on the service.
What are the advantages of being plumbed in?
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It acts as an engine warmer. Some prefer that to engine block heaters. One less radiator to leak and maintain. I don't like it. I have had too many problems due to leaks. To each his own.
The new comfort pro sold by Carrier dealers has a stand alone unit with a larger rad. it has a 6k gen and plug the block heater into the APU.
Or you can stay with the 4k gen set unit and use the truck rad system
The reason for the big new gen is to plug in the block heater
Can you post a link to this unit? No dealers I have spoken to know anything about it.
I'll call the Carrier dealer in Fort Wayne and get more info.
Must be REALLY new, it is not on their web site yet. Neither Carriers, or Impco's sites
Just like everything else with this search for an APU, nothing is going right. LOL! Nothing comes up on the link.
I am on a computer. Don't have a smart phone.