Having problems with your Air Conditioners ?

Thermostat I have a RV with a coleman unit, unit run fine, but the thermostat blows the 2.5 amp fuse, I change to a 5. amp and it still blow the fuse, it will run for two day some time a week before it blows it out. What can I do.


Answers :

Several things cause fuses to go. But you ace in the hole is that it works for sometime before it goes out. This suggests that a relay or contactor is not pulling in as it should. I would try replacing the fan relay (if so equipped) and definitely the compressor contactor. If either of these try to pull in and are off center internally the result can be blown fuses intermittently.

DO NOT GO ABOVE 5 amp fuse or you may burn out the transformer.
The other things that can cause a blown fuse intermittently where your describing (although less likely unless subject to rodents and or high or low voltage spikes)
1 a temporary short in the control wiring (wire to or from the thermostat).
2 A short intermittent on the control board (if so equipped)
3 A relay on the control board or the SS circuitry is not operating with in design parameters.

I would really like to know what you discover the problem is.

If this helped you understand your system or problem please rate me as high as you can and thank you for using fix ya. Good Luck.

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