FRY Fryer-Gas Left Vat he said had probe code. Center vat he said had probe, help and popping noise. Right vat he said had popping noise too. Found insulation on top of center vat fan. Checked manifold pressure center vat, at 3.1" WC. Ohmed center vat probe, showed ok. Customer said he already pulled and cleaned fans. Recommend replace the 3 relays. Also need to pull fryer out, inspect IR heaters and flues. Only have 2.0 micro amps at modules. should be 2.5 to 3.5. Incoming gas should be 6" to 14" WC. Pin 13 and 14 to ohm probe. 6 and 2 on board. Will order relays. Scheduled for Monday at 8 am. 717-332-1472 Jack. 1/18/21 Replaced the 3 heat relays. Pulled rear covers and inspected so 6 burners. Not cracked. Air Leaking at rear burner covers. Needs insulation for rear burner covers. Also needs new ignitors for right vat only. Will create new work order to order parts.