Blown Fuse On Air Handler Control Board
Blown Fuse On Air Handler Control Board. Main fuse box is not tripping, but replaced circuit breaker and 30 amp cartridge fuses in outside fuse box. Searched for obvious shorts to the condenser outside and found none.
Fuse on the circuit board blowing. She called me back this morning. So i went and checked the fuse.
Furthermore, I Would Remove All The Control Wires From The Board.
Looked inside the condenser, and found nothing. Replaced the 5 amp fuse, closed the panel, and the blower started. In your case, you likely have a dead short somewhere in the wiring or a bad load that is going short to ground causing the fuse to blow.
As Soon As You Request Heat The Fuse Blows And When I Try To Run The Fan To On Nothing Happens.
The difference between 3a and 5a on a circuit board is very significant. I've disconnect the c and y terminals on the air handler control board plus the cnt terminal which goes to the contactor without help. Discussion starter · #1 · dec 25, 2008 (edited) hello, i have a carrier central unit that keeps blowing a 5 amp fuse on the control board of the air handler/blower.
It Has Blown 5 Times The In The Past Year, Only Whenthe A/C Was Running But Now It Is Happening When The Heat Is Running.
I have a honeywell hz322 zone controller. She called me back this morning. You may have a bad circuit board in your air handler or furnace.
And A Short On 3A Board Using A 5A Fuse Is Very Likely To Blow A Component.
Consequently, if the fuse has blown, it means you have a problem on hand for which you may require professional assistance. When you by passed the 3 amp fuse and took out the transformer, lucky for you it didn't take out the control board as well. When i went to turn on the a/c, the 5 amp fuse blew again (and again).
Hi, Just To Let You Know, Never Jump Out A Blown Fuse As If Blown, You Have A Problem In The Control Voltage Side Of This Unit, Anywhere From A Shorted Stat To Any Part That Is Controlled By 24 Volts.
A case of reduced airflow can spring from different circumstances, such as a limited number of return air vents, misconfigured duct runs and holes in the air ducts. Consequently, this will blow the fuse on the control board, preventing the draft inducer from starting, which then keeps the rest of the furnace from functioning properly. The fuse goes even when no heat is requested.
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